In its current form, an infected JPEG file cannot infect another computer on its own. But Gullotto says there's no reason a virus writer couldn't make the picture itself able to infect other ...

Other viruses exploit the preview feature that allows users to see an e-mail before actually opening it. Freshman Adam Wilson was infected with a virus that his anti-virus software caught, but was ...

When the picture is viewed, it can infect other pictures. If the author wished, the virus could delete files on the computer or perform other mischief.

Viruses enter your system via e-mail, downloads, infected floppy disks, or (occasionally) hacking. By definition, a virus must be able to self-replicate (make copies of itself) to spread.

Two new computer viruses are making a nuisance of themselves this week. Navidad, which has arrived just in time for the holiday season, first made the rounds on Friday but on Tuesday was described ...

Beware the free Internet at the local coffeeshop. Researchers have created Chameleon, a virus that travels over Wi-Fi networks. One simulation infected 2,000 routers in London in six weeks.

Similarly, viruses can infect your computer when you visit fraudulent websites. Sometimes you can inadvertently install a virus from an infected external drive, such as a USB flash drive.

A computer virus is a form of malicious software that piggybacks onto legitimate application code in order to spread and reproduce itself.

It can be difficult to distinguish a hardware or software problem from the symptoms of a virus or worm on your PC.

How to effectively remove malware or a virus from your computer with these essential steps to restore your system's security and performance.