Virus and Spyware Information

Viruses

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 e-mail program to spread itself to other computers, or even erase everything on your hard disk.

Viruses are most easily spread by attachments in e-mail messages or instant messaging messages. That is why it is essential that you never open e-mail 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.

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 viruses, it's essential that you keep your computer current with the latest updates and antivirus tools, stay informed about recent threats, 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.

What about spyware?

Although spyware programs are different from viruses, some can behave like viruses and pose similar and other risks. To help protect against spyware, use antispyware software such as Windows Defender. Windows Defender comes with Windows Vista. If you use Windows XP SP2 / SP3, you can download Windows Defender for no charge.

Tip: Because no security method is guaranteed, it's important to back up critical files on a regular basis before you encounter a virus or other problems.

Signs of viruses: Are you 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 primary indicators that your computer might be infected:

• Your computer runs more slowly than normal

• Your computer stops responding or locks up 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.