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How to remove and avoid computer viruses

A computer virus is malicious software (also known as "malware") that can copy itself and infect other software or files on your computer.
If you suspect your computer has been infected, the Microsoft Windows website provides step-by-step instructions for removing viruses and other malware.
Fortunately, if you update your computer and use free antivirus software such as Microsoft Security Essentials, you can help permanently remove unwanted software and prevent installation in the first place.
Note What you might think is a virus could actually be spyware. Microsoft Security Essentials helps protect against spyware, too.

How do I know if my computer has been infected?

After you open and run an infected program or attachment on your computer, you might not realize that you've introduced a virus until you notice something isn't quite right.
Here are a few indicators that your computer might be infected:

• Your computer runs more slowly than normal
• Your computer stops responding or freezes often
• Your computer crashes and restarts every few minutes
• Your computer restarts on its own and then fails to run normally
• Applications on your computer don't work correctly
• Disks or disk drives are inaccessible
• You can't print correctly
• You see unusual error messages
• You see distorted menus and dialog boxes

These are common signs of infection—but they might also indicate hardware or software problems that have nothing to do with a virus. Unless you run the Microsoft Malicious Software Removal Tool and install industry-standard, up-to-date antivirus software on your computer, there is no way to be certain if your computer is infected with a virus or not.
Tip Beware of messages warning you that you've sent email that contained a virus. This can indicate that the virus has listed your email address as the sender of tainted email. This does not necessarily mean you have a virus. Some viruses have the ability to forge email addresses. In addition, there is a category of malware called rogue security software that works by causing fake virus alerts to pop up on your computer.

How do I install updates and antivirus software if I can't use my computer?

It might be difficult to download tools or update your computer if your computer has a virus. In this case, you can try one of the following options:

• Use another computer to download the tools to a disk.
• Get help through Microsoft support.
• Find a local expert:

How can I prevent infection by computer viruses?

Nothing can guarantee the security of your computer, but there's a lot you can do to help lower the chances that you'll get a virus.
It's crucial to keep your antivirus software current with the latest updates (usually called definition files) that help the tool identify and remove the latest threats.
You can continue to improve your computer's security and decrease the possibility of infection by using a firewall, keeping your computer up to date, maintaining a current antivirus software subscription (such as Microsoft Security Essentials), and following a few best practices. For in-depth information about how to avoid infection, visit the Microsoft Windows website.
Tip Because no security method is guaranteed, it's important to back up critical files on a regular basis.

What is a computer virus?

Computer viruses are small software programs that are designed to spread from one computer to another and to interfere with computer operation.
A virus might corrupt or delete data on your computer, use your email program to spread itself to other computers, or even erase everything on your hard disk.
Computer viruses are often spread by attachments in email messages or instant messaging messages. That is why it is essential that you never open email attachments unless you know who it's from and you are expecting it.
Viruses can be disguised as attachments of funny images, greeting cards, or audio and video files.
Computer viruses also spread through downloads on the Internet. They can be hidden in illicit software or other files or programs you might download.
To help avoid computer viruses, it's essential that you keep your computer current with the latest updates and antivirus tools, stay informed about recent threats, run your computer as a standard user (not as administrator), and that you follow a few basic rules when you surf the Internet, download files, and open attachments.
Once a virus is on your computer, its type or the method it used to get there is not as important as removing it and preventing further infection.

Computer Hardware & Software Tips : Microsoft Word 2007 Tutorial

Opening Microsoft Word 2007 from a computer start menu will bring up a blank document that can be used for word processing, creating lists, typing letters or making a variety of documents. Learn how to save and re-open a Microsoft Word document with help from a computer programmer in this free video on Microsoft Word.

Tips On Buying A CD-ROM Drives.

INTRODUCTION


CD-ROM drive is used with computer to read the information from the CD-ROM. Today CD-ROM drives have transfer rates ranging from 48X to 75X or more. Generally Purchasing a CD-ROM drive relatively easy task however can involve some considerations when purchasing


Technology of CD-ROM


Before considering purchasing a CD-ROM it is also good consider the other available options.


CD-R - A CD-writer or recorder (or simply CD-R drive) is used to write data on CD-R disks. Usually, a CD-writer can read information from CD as well as write information on CD, The locally produced CD-R disks are created with CD writer. The speed of these drives is up to 52X or more.


CD-RW - You must have a CD-RW drive to write date on the CD-RW. These drives have read and write speed is up to 52X or more but the re-write speed is 10X or more. The CD-RW drive is advanced and more expensive than CD-R drive. It can write data on both CD-R and CD-RW discs and also read data from them


DVD - DVD stands for Digital Video Disk Versatile Disc. DVD-ROM is an extremely high capacity optical disc with storage capacity from 4.7 GB to 17 GB.


TRANSFER RATES


Today CD-ROM drives have transfer rates or speeds ranging from 52X to 72X or more. For Example, a 52X CD-ROM drive has a data transfer rate of 7,200 KBps (i.e. 48 X 150 = 7200)or 7.2 MBps. It means that the higher the number, the faster the CD-ROM drive. This speed is generally only going to be noticeable when installing a program or copying large amounts of data from a CD.


For a CD-ROM drive, not to be confused with a CD-R, CD-RW or DVD drive can vary depending upon the speed and the interface the CD-ROM drive uses.

Tips On Buying A Desktop Computer

INTRODUCTION

A desktop personal computer is a most popular mode of personal computer. The system unit of the desktop personal computer can lie flat on the desk or table. In desktop personal computer, is usually placed on the system unit. A Purchasing a home or business computer can be a big and sometimes costly decision. It may be important to consider whether a laptop may be a better option instead, click to find out more about laptop deals. Below is a listing of helpful suggestions for what to look for and ask when purchasing a home or business computer new or used. 

NEW vs. USED

Today there are two options to buy a computer, a new or used computer. Used computer are some time out of date, but you can buy it with very low price as compare to new computer, but I think branded or used computer are much stable than a new  computer. Before purchasing a computer consider if you should purchase a new or used computer. Many individuals sell computer before they are out of date allow you to purchase a relatively decent computer. Before purchasing a new computer from a computer manufacture look at what is available and review the below precautions when purchasing a computer.

More Considerations

When purchasing a computer it is likely that you will have a general idea of what you may like in the computer or how you would like to configure the computer. Below is a listing of the various components likely to be found in a computer and recommendations and tips when considering any of the following components.

 

Device	Short recommendation
Case	Generally there are two types of Computer Case are available in market, for Example  Tower case and desktop case. The system unit of the desktop personal computer can lie flat on the desk or table and the monitor is usually placed on the system unit. An other model of the computer case is known tower. The system unit of the tower PC is vertically placed on the desk or table. But purchasing a computer case is generally not an important consideration when you are going to buy a Computer.  However it depends upon the user needs and choice to building a computer case may find it important to consider the following considerations.
CD Media	CD-R -always will be an important consideration to think about when purchasing a new computer or used computer. A CD-writer or recorder (or simply CD-R drive) is used to write data on CD-R disks. Usually, a CD-writer can read information from CD as well as write information on CD, The locally produced CD-R disks are created with CD writer. The speed of these drives is up to 52X or more. CD-RW - You must have a CD-RW drive to write date on the CD-RW. These drives have read and write speed is up to 52X or more but the re-write speed is 10X or more. The CD-RW drive is advanced and more expensive than CD-R drive. It can write data on both CD-R and CD-RW discs and also read data from them DVD - DVD stands for Digital Video Disk Versatile Disc. DVD-ROM is an extremely high capacity optical disc with storage capacity from 4.7 GB to 17 GB.
Hard Drive	Hard drives have and always will be an important consideration to think about when purchasing a new computer or used computer. Hard disk is most commonly used storage device in personal computers and laptop computers. Most application programs and operation systems require hard disk for installation and operation.
Processor	The computer processor is and will always be an important consideration when purchasing a computer. Processor is considered the brain of the computer. The CPU fetches instructions of program from main memory and executes them one by one. The speed of the CPU is measured in Mega Hertz or Giga Hertz and speed from 500 MHz to 3.4 GHz, it depends upon a user needs, that is why purchasing a processor is an important consideration when building or buying a computer. There are several considerations and additional information about what to ask and look for when purchasing a processor directly or already installed into a computer.

How to Buying a Printer?

Introduction 

These are most commonly used output devices used to get prints of documents on the pager. Different printers have different mechanisms. Therefore purchasing a printer can be a sometimes confusing task. The following is additional information that will help in your purchasing decisions.

Technology of printers

There are many types and technology of printer are available in market but the most popular and commonly used  are inkjet and laser printer.

Ink Jet Printer. The inkjet printer is not-impact character printer and prints one character at a time. The printing quality of inkjet printer is measured by the number of tiny ink of drops per inch(dpi). Most inkjet printers range from 300 to 2400 dpi. Printers with higher dpi usually are more expensive but having high printing quality. The speed of an inkjet printer is measured by the number of pages per minute (ppm) it can print. Its printing speed is up to 15 ppm. Therefore purchasing a printer can be  depends upon printers dpi and ppm but It depends upon user need.

Laser Printer. A Laser printer is the fastest and high quality printer, but a laser printers are more expensive than inkjet printers and their print quality is also higher. The print quality and printing speed of laser printers make them ideal for offices and business. The laser printer can print text and graphics in very high quality resolution. The commonly user laser printers have resolution of 300 or 600 dpi and printing speed is from 5 to 30 ppm. The high quality laser printers have resolution from 600 to 2400 dpi. The printing speed of these printers is also more than 150 ppm.

Speed and price range

The price of laser printers depend on the quality and printing speed. The color printers are more costly than black-and-white laser printers. The higher the resolution and speed, the more expensive the printer.The price range can vary depending upon the quality of the printer and the type of printer for example inkjet, laser printers.

READY TO BUY

Once you have reviewed the appropriate information and believe that you are ready to make a purchase of a printer ensure that the source which you plan on purchasing the printer from is a reputable source and you have reviewed our section on what to look out for when purchasing over the Internet.

Tips On Buying A Computer Motherboard

Introduction of Motherboard 
The motherboard is the main circuit board of the system unit. You can say that motherboard is the master circuit board in the computer. Many new user of computer are not well aware about motherboard that is why for users planning on building a computer a motherboard can be a confusing decision. Below we have listed some considerations and tips when looking at purchasing a computer motherboard. 
There are many factor of the motherboard is a crucial consideration when looking at a motherboard.

PC motherboard has two or more expansion slots used to add new components to the computer. The memory chips are also inserted into the expansion slot to expand the size of memory. Given option are very important in any motherboard for example:

Accelerator: It is used to increase the speed of processor.

I/O: It is used to connect input/output devices such as printer, mouse and keyboard.

Game: It is used to connect joystick.

Disk Controller: It is used to connect disk and CD drives.

Modem: It is used to connect other computers through telephone line or cable telephone line.

TV Tuner: It is used for viewing television channels on the computer monitor.

Tips On Buying A Computer Memory.

Introduction of Computer memory.

The Computer memory plays very important role in data processing. Computer memory means the computer can use powerful program with large size. It also improves the data procession speed of computer, that is way it is very important to verify When purchasing a computer memory, this memory is suitable for your computer and needs. Below is a listing of different considerations and tips to look for when purchasing computer memory.

Type Of Memory

There are many types of memory available in market, Before purchasing any memory or considering purchasing memory it is important that you distinguish the type of memory that is required. Below is a listing of some of the configurations of computer memory.

Memory type: SIMM, DIMM, RIMM,
Amount of Pins: 72-Pin, 30-Pin, etc..
Speed of memory: 10ns, 60ns, 70ns, etc..
Below is a listing of additional considerations to look out when purchasing computer memory.