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” My Computer doesn’t power on at all ”

a.) Power plug problem
Check power plug; ensure that it is plugged into the wall and plugged firmly into the computer/power supply

b.) Faulty power strip/surge protector or insufficient power coming from the outlet.
Plug computer into a different outlet to narrow down the problem

c.)Bad power supply
Power supply may need replacing; have it tested by a technician if possible

d.) Bad power switch
Have a technician take a look at your PC to determine this;  if you can’t do it yourself.

Many power supplies have a switch on the back of them, which must be set to the on position in order for power to flow through it, to the PC. Sometimes the solution to your PC powering on is flipping this switch!

e.) Disconnected cords/cables within the computer
Have a technician take a look at your PC to determine this if you can’t do it yourself

f.) Bad motherboard
Have a technician take a look at your PC to determine this if you can’t do it yourself

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“ I got the blue screen of death ( a  blue screen following a crash ) “

a.)   Spyware or viruses
Scan your computer for spyware using a program such as Spybot Search and Destroy or Malwarebytes; which are both free. For virus scanning and removal, just download: ”AVG free “.  Scan and remove any viruses found.  Restart your computer and see if the problem persists.

b.) Driver issues
Ensure you are using the most current drivers for your hardware. Make sure that you have critical patches for Windows installed.  When uninstalling hardware, makesure that you use driver cleaners if at all possible to ensure remnants of old software are cleaned from your registry.

c.) Corrupt registry
Uninstalling/installing software changes keys in your registry. The registry is critical for Windows to function.  Software is available that will check your registry for errors,as well as fixing any error(s) that it finds. Once a registry is corrupted, it is sometimes difficult to repair back to it’s original state. Sometimes a reinstall or repair of Windows is needed.

d.) Bad memory (RAM)
Memory that is faulty does not allow accurate reading/writing to RAM, or Random Access Memory.  Many times, memory in need of replacement will cause blue screen errors. Have a technician take a look at your PC to determine this if you can’t do it yourself.

e.) Bad power supply
Power supply may need replacing; have it tested by a technician if possible

f.) Bad motherboard
Have a technician take a look at your PC to determine this if you can’t do it yourself !

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“ My internet doesn’t work/I can’t get online (Basic troubleshooting) “

a.) ISP problems (Internet Service Provider)

The first step, is contacting your ISP to confirm that there are no connectivity issues or outages, that they know of. If they showa solid connection, proceed to troubleshooting your  connection further.

b.) Faulty or loose connection from the phone jack to your modem.

Ensure that the phone cord plugged into the wall is actually connected. Many times, a connection can be lost or unreliable, due to a plug with a broken clamp, or that is making a bad connection.  Trace the cord back to your modem and make sure that the cord isn’t frayed or damaged, and that the connection into the modem is solid. If possible, troubleshoot by using a different cord.

c.) Router/Modem Issues

Many times a connection problem can be caused by problems with the modem or router. Wireless routers can really cause problems when troubleshooting a wireless internet connection issue.  The first thing to do is to unplug the power cord(s) and cable(s) connected to the  router & modem, and wait for one minute. Also, shut down the PC for one minute and power up.

Afterwards, plug the connectors back into the router and modem.  If that doesn’t solve the issue, the next thing to do is to remove the network cable from the router, and plug it directly to the network card in the computer – and disable the wireless networking signal on the PC (WI-FI).

(The network cable is the cable that plugs to the router, from  the modem – also known as CAT 5 cable)This is especially important when narrowing down wireless internet connection problems.

(Also check to make sure that your router’s firewall isn’t disrupting your connection)

d.) Viruses or Spyware/Malware

Certain types of viruses, malware and spyware can cause problems with your internet connection.  Scan your computer regularly to ensure that malicious software doesn’t wreck havoc on your internet connection. If you can no longer connect to the internet after being infected with a virus or spyware, it’s most likely time to see a professional technician.]

e.) Software

Your operating system, and software installed on your computer,  can cause problems with you connecting to the internet (for instance damaged Winsock files). If your ISP isn’t the issue,  your modem/router or connections are not the cause of your lost connection, and you haven’t been infected with any viruses or spyware;  software is the issue.  Other than your operating system being the culprit, a software firewall if not configured properly; can cause you to lose your internet connection.

Lastly (thought there are more possibilities that can’t be all listed), the TCP/IP configuration can be the reason that you are not connecting.  Since explaining how your TCP/IP configuration works may prove too difficult to understand for most average computer users, it’s best to have a technician look at your computer if you have problems accessing the internet; that aren’t caused by reasons a – d.

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Companies invest so much (in terms of both money and time) in a local area networks because there are many advantages that a local area network brings to a business and how it is administered.

Some businesses use a local area network in such a way they are highly dependent on it always working. If the company’s network fails, then you may see all the employees chatting away in the corridors because they can’t do their work. This means big losses for the company and causes stresses on the employees. All companies must consider their local area networks a vital asset and downtime must be avoided. This imposes huge demands on the network staff to keep such networks running almost 100% of the time.

The advantages of Computer Network Management

One of the main advantages of installing and maintaining LANs is the opportunity they create for better communication and cooperation between employees and customers.

Security considerations: Local Area Network security can be both a help and hindrance. Comprehensive security is beneficial because it provides a central and safe strategy for data access and disaster recovery. All information is protected by the design and implementation of the network security solution. On the other hand, interconnecting computers in local area networks creates a security risk, since doing so makes it technically possible for intruders to access many machines on the network at once.

Cost considerations: Installing a local area network is a relatively expensive project. Servers, cabling, switches, routers and software can all be expensive and should never be purchased without expert advice. Keeping the network operating and secure also requires a lot of resources and can be costly.

Surprisingly, a local area network can bring a number of cost savings. Sharing resources avoids the need to purchase equipment for each individual. Even more important is the security that a local area network can provide. Data loss could cost a business a great deal of money and in some cases, cause the business to shutdown altogether. Computer Network Management should require a consistent routine for data backups with regular checkups of data quality – a practice that will save a company huge sums in the event of a mishap.

Computer Network Management: preliminary analysis phases

The first phase of computer network management is to determine the source of the problem (a preliminary study that looks into several options of differing scope may be useful here) and defining it in a specification of requirements. Examples of what should be evaluated are different network operating systems, mail systems, and other applications. The choice of hardware components should also be evaluated. This phase is generally aimed at establishing what the system should do, not how it should do it.

Computer Network Management: design phase

The purpose of design phase is to determine how the requirements of the specification are to be met. The current approach to large, complex projects is to break them down into smaller, more manageable subprojects.

Computer Network Management: implementation phase

This phase involves the physical installation of the local area network. Cables are run, software is installed, and computers and other hardware are put in place.

Computer Network Management: integration and system testing phase

In this phase, commissioning of the network begins, and routines are adapted to users and the operating personnel. The system must be tested, both to ensure that the network meets the requirements set out in the specification and that it is stable enough to perform the central function it has in the organization.

Computer Network Management: operation and maintenance

Local area networks have complex operating routines. This is because there may be serious consequences when faults occur or unauthorized persons gain access to the system. Many companies have employees devoted solely to take care of running and maintaining computer networks. These system administrators may deal with network issues such as performance, reliability and security of both hardware and software.

Computer Network Management: tools

Although an organization may have computer administrators on site, they must also monitor the network more than eight hours a day. In fact, some of the worst trouble that arises with networks can happen during the night hours when nobody is using the network. With the right computer network management tools, your organization can receive the security of knowing that problems will be foreseen, prevented, and taken care of – and that your network administrator can be notified at a moment’s notice, should anything go exceptionally wrong.

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The world of computers and information technology is going through an era of an electronic terrorism, in the form of the computer virus. It is a problem that is potentially so dangerous that it threatens the proper functioning of the virus system in today’s information age.
The virus whether biological or electronic is an information disorder. Biological viruses are tiny genetic codes DNA or RNA that take over the machinery of a living cell and are capable of marking thousand of replicas of the original virus. Like its biological counterpart, a computer virus carries in it an instructional code that makes copies of itself.
Computer viruses are computer programs which are a collection of coded instructions. The basic difference between a normal program and virus is that viruses are self replicating; they have the capacity of executing themselves without being asked for. The ‘Computer virus’ is a very broad term in itself and includes not only viruses, but also worms and Trojans.

Classification of Computer viruses:-

Viruses are classified on the basic of their mode of existence and there are three categories of viruses.

1. BOOT  Infector:-
2. SYSTEM  Infector:
3. GENERAL EXECUTABLE PROGRAM   Infectors:-

BOOT Infectors:-
As the name suggests, they are characterized by the fact that they are physically reside in the boot sector [0] sector of the disk. A system infected by such a virus will have the virus residing in a particular area of the disk rather then in a program file. These viruses get loaded soon after the Power Of Self Test and control the system and remains in control at all times. They some times have the capacity to trap soft booting (CTRL ALT DEL) and remain in control even if the system is booted from a non infected floppy, thereby contaminating the clean floppy.

SYSTEM Infectors:-
The second category of virus deals with components of the system itself. All machines without execution require an operating system in order to create an environment in which the operator works. In MS-DOS, COMMAND.COM contains all the internal commands. If no such command file exists, commands such as COPY, DIR etc. are not loaded into the memory when the machine is booted. The system infectors attach themselves to a file such as COMMAND.COM or other memory resident files and manipulate these files.

GENERAL EXECUTABLE PROGRAM Infectors:-
From the infection point of view, these are most dangerous and devastating of the three classes of viruses. They attach themselves to program files and can spread to almost any executable program in any system. These viruses change the original program instructions into a “jump” to its own code and follow that code with a return to the original program. As a result, whenever the program is executed, the virus gets loaded and executed first and then allows the original program to process. It remains memory resident and infects each and every program that is loaded for execution.

Types of Viruses:-

Worms:-
A worm is software that uses computer networks and security holes to replicate, or affect other programs. A copy of the worm passes through the network to another machine that has a specific security hole. It then copies itself to the new machine, and then starts replicating from there.

Macros:-
Macro viruses’ use commands-called macros-embedded in the other software applications to infect and spread to other files used by that software. For example, Microsoft Word and Excel have macros, and macro viruses can spread by exploiting these commands.

Boot Sector viruses:-
Boot sector viruses are older types of virus and are not so common today. They used to infect computers startup programs, so that the virus would become active as soon as the computer started up.

Trojan Horses:-
Trojan Horses are programs that claim to perform a particular function but which in fact do something different. For example, they could infect your computer with a virus or erase your files.

Backdoor Trojans:-
Backdoor Trojans are programs that allow other computer users to remotely control your computer via a local area network or the internet.

Resident Viruses:-
These types of virus hides permanently in the RAM memory. From here it can control and intercept all of the operations carried out by the system corrupting files and programs that are opened, closed, copied etc.

Direct Action Viruses:-
When a specific condition is met (such as the execution of the virus) these virus will go into action and infect files in the directory or folder that it in and others as well.

Overwrite Viruses:-
These types of viruses are characterized by the fact that it deletes the information contained in the files that it infects, rendering them particularly or totally useless once they have been infected.

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The simple answer is, “NO!” Essentially, you will spend a lot of money and time getting certified and learning the latest platforms and technologies and best practices. And you will end up doing a lot of low-level, low-skilled hardware repair and work that puts you in the same category as a commodity. Why? Because every year, hardware components become more disposable and replaceable and less repairable.

The following 4 tips can help you understand why you should stay away from doing computer maintenance contract subcontracting with a national service organization:

1. Many Computers are Dirt-Cheap and Basically Disposable. As an example, think about a standard $400 consumer-grade PC. Can you imagine one of your clients spending money on an out-of-warranty repair for this type of computer? And who would spend money out of warranty as part of an on-going computer maintenance contract to have a $400 laser printer repaired? You can’t focus your consulting business on these minor computer repairs. Rather, you should target small businesses that need your help on more complex IT business problems and can afford your sophisticated expertise.

2. Labor Allowances for Computer Maintenance Contract Work are Low with National Service Organizations. National service organizations are going to be dealing with warranty repairs on pretty inexpensive hardware. That being said, how big will the labor allowance be for a $1,200 notebook? Many big hardware vendors are so hard-up for cash that they are always on the verge of going out of business. There are only a handful of major hardware players that are still in good financial shape. So you have to think about what your chances of getting paid well in this situation will be.

3. Think About Your Profit Margins on Computer Maintenance Contract Repairs for National Service Organizations. Consider what you will make on a repair. You will probably only make somewhere between $50 and $200 (at the absolute most). You will do a lot better when you find small businesses in your area that need high-level professional IT services on a regular basis and not just your help unjamming a printer or rebooting a computer.

4. Computer Maintenance Contract Subcontracting for National Service Organizations is Barely Profitable. When you act as a subcontractor for a national service provider, you will be working against yourself and your business constantly. You will most likely be in eight different offices every day as opposed to one or two. And you will be given a $65 labor allowance to replace a system board, no matter how long it takes you, instead of billing out $100-$150 per hour for high-end network support services and network integration services.

Repairing and troubleshooting hardware is low-end commodity work and should be left to those that can afford to bill out at $20-$30 per hour. You need to focus on high-end consulting and establishing a strong computer maintenance contract program with steady, high-paying clients if you want to really succeed in the small business IT world.

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However, the person who owns this business wants to have a long time customers who are willing to give out by the kind of services that one who needs it. All you need to do is to call and get all the advices or suggestions for your computer repair that you want. You can easily find out that person at the other end of the line that is well-informed and knows their deal. So, the next time when you are having problems about your computers, you already know where to reach out for a help. Although, there are several different services that are offer out there, but if you want to upgrade your computer, web design, repairs or go in and learn more about computers, you will find all of it and much more out here. You can visit this place anytime you need for any kind of help or accessories as well as the pieces you need.

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Computer Hardware Sales via Key Retail Formats in Republic of Korea to 2013

”Computer Hardware Sales via Key Retail Formats in Republic of Korea to 2013” databook provides market value data for three key market segments and eight key retail distribution channels. It focuses on data and analysis of market revenues and segmentation. It also provides historic and forecast data, as well as a comparison against the top five countries in the market.

Scope

Computer Hardware retail sales revenues and analysis from 2003 to 2008 and forecast values up to 2013

Market value of three categories: computers, storage devices and, peripherals and devices

Current and forecast analysis of sales via major retail channels in the computer hardware industry as well as its sub-categories

Highlights

Computer Hardware retail sales in Republic of Korea increased at a compound annual growth rate of 4.8% between 2003 and 2008.

Computers sales led the computer hardware market with a share of 50.6% in 2008. Specialist electricals and electronics retailers were the leading retail format for computers in 2008.

Reasons to Purchase

Design effective marketing and sales strategies by identifying the key growth categories and retail formats in terms of sales

Develop business strategies by understanding the quantitative trends within the computer hardware market in Republic of Korea

Understand the future direction of the market with reliable historical data and full five year forecasting

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Computer software is usually brought in CD format and is then installed onto our computers from this. Any new programmes etc that you buy for your computer can be classed as a form of software. Without software you wouldn’t get very far with the use of your computer.

When software is placed or opened on your computer it is loaded into the RAM and executed through the central processing unit (CPU) it is then available for you to use.

Software comes in three main types, the first being system software. This helps to run your computer hardware as well as your computer system. The second is programming software. This provides tools to assist programmers in writing computer programmes, such as text editors, compliers, interpreters and linkers. The last form of software is application software. This allows end users to accomplish one or more specific tasks. Typical applications include industrial, business, educational, medical databases and computer games; businesses being the biggest users of application software.

There are many avenues in which you go approach in order to buy computer software such as you can buy it new from retail stores; however many people find it difficult to find the exact software that they need from a retail store and often turn to buying software online.

The Internet in itself is a bigger competitive market. You have more chance of finding what you need by using the Internet. This applies to the purchasing of computer software. There are many Internet sites that primarily focus on the selling of computer software giving you more of a chance of finding what you want as well as giving you more choice of brands and the power of a software. It can also be cheaper if you buy it online as there are a number of good deals around that will enable that you get the most for your money.

One good site that appears on the Internet is called kelkoo. This site is a price comparison site specifically for computer parts and software. Again this demonstrates that by using the Internet you are more likely to get a good deal on the software that you purchase. Also the Internet can sometimes give you the option of online downloads meaning that you can purchase and download your product at any time and from anywhere in the world.

One thing that you need to be aware of however if you are hoping to use the Internet to purchase your software is fraud. In order to ensure that you are buying a genuine copy you should find out about the site that you are buying your software from or stick to retailers that you are aware of. This makes sure that you don’t spend money on something that could potentially harm your computer and that is also illegal.

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The software problems are related to the applications installed on a computer. In other words, when a computer program does not do the work it is designed to do, it is referred as software issue. As a result the computer behaves abnormally. It can slow down in performance, or sometimes doesn’t start at all.

Some of the common software problems are:

1. User interface problems
2. Calculation problems
3. Communication problems
4. Function problems
5. Testing problems
6. Design problems

Documentation problems A hardware problem occurs with the malfunctioning of some physical part of a computer system like motherboard, sound card, mouse, keyboard, power supply, storage controllers, video display controller, removable media devices, internal storage and many others.

There are some problems which don’t require any type of technical expertise to solve them. If you are a beginner then also you can try to solve such problems. In case, you face any performance related problem with your computer then you can test out your PC’s hard drive to solve such issue, or you can also check whether the external hard drive attached to a PC is working properly or not.

Follow these steps to check a Windows 7 computer hard drive for problems:

1. Click on “Start” button, and then click on “Computer”.
2. Right-click the particular drive which you wish to check for problems, and then click on “Properties” tab.
3. Click on the “Tools” tab, and then click on “Check now” under “Problem checking” option.
4. You will see two options: “Automatically fix file system problems” and “Scan for and attempt recovery of bad sectors”, you can select any one option or both the options, in case you want to check and repair both the file problems and physical problems.
5. Finally click on “Start” to start the process.

If any problem occurs in a computer, the computer behaves in abnormal manner. You can try to fix computer errors or problems yourself but if you’re unable to do so, you may seek assistance from any computer professional or technical support provider to solve or fix the problem you are facing in your computer.

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A computer network is comprised of connectivity devices and components. To share data and resources between two or more computers is known as networking. There are different types of a computer network such as LAN, MAN, WAN and wireless network. The key devices involved that make the infrastructure of a computer network are Hub, Switch, Router, Modem, Access point, LAN card and network cables.

LAN stands for local area network and a network in a room, in a building or a network over small distance is known as a LAN. MAN stands for Metropolitan area network and it covers the networking between two offices within the city. WAN stands for wide area network and it cover the networking between two or more computers between two cities, two countries or two continents.

There are different topologies of a computer network. A topology defines the physical layout or a design of a network. These topologies are star topology, bus topology, mesh topology, star bus topology etc. In a star topology each computer in a network is directly connected with a centralized device known as hub or switch. If any computer gets problematic in star topology then it does not affect the other computers in a network.

There are different standards and devices in computer network. The most commonly used standard for a local area network is Ethernet. Key devices in a computer network are hub, switch, router, modem and access point etc. A router is used to connect two logically and physical different networks. All the communication on the internet is based on the router. Hub/Switch is used to connect the computers in local area network.

Hopefully, in this article you may have learnt that what a computer network is, how important it is in our lives, what are different network devices, standards, topologies and communication types.

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What a Virus Is:
A computer virus is a program that can copy itself and spread across one or more computers when they are connected to a network without the knowledge of the user. Viruses can be particularly tricky to remove from your computer because they can self-modify or change over time as they copy themselves.

Fortunately, viruses can only spread across multiple computers if an uninfected computer is connected to a network, or if the computer gets connected to infected media such as a USB drive or a CD.

Do you suspect your computer might be infected with a virus? Look for these tell-tale signs:

1. Computer is running more slowly than usual:

If your computer runs slowly upon start-up, you may have a virus. Common signs are having to wait a long time to perform simple tasks such as checking e-mail or opening files. In really serious cases, your mouse pointer may even lag as it moves across the screen.

2. Locks up or crashes frequently:

Does your computer frequently just stop working or otherwise lock up, causing you to have to restart your computer? This phenomenon is also called freezing or freezing up. If your computer locks up often and/or suddenly, a virus could be the culprit.

3. You cannot access your disks:

If you are having trouble accessing your internal hard drives or external disk drives, your computer may have a virus. For example, if you click on your directory and cannot gain access to your disks, this is a tell-tale sign you may have a virus.

4. You cannot print items correctly:

Printer performance an also be affected by the presence of a virus. For example, if your printers are not accessible or if the printing results are not satisfactory, this could be a sign of a virus at work.

5. Your anti-virus software is disabled for no apparent reason:

Most computers ship with anti-virus software pre-installed. The best anti-virus products should be more than sufficient in keeping your computer protected. However, you know you have a serious problem if your anti-virus software itself seems to be repeatedly disabled upon start-up or when you try to run a virus scan. The most dangerous viruses can actually try to block your anti-virus software from working properly (for obvious reasons), which effectively renders your computer open to all potential invaders.

Viruses are not the only things that can cause performance problems for your computer. Other common causes are malware, adware, spyware, and registry problems. If your computer is not performing properly, you should explore all possibilities, including these other common causes of degraded performance.

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