
Viruses can take several different forms and can *do* various things. The most common seems to be to get into your email address book and send itself to everyone in your address book. Others can wipe your hard drive ..
Best thing to do is to get some good anti virus protection. There are several on the net free or you can buy them , usually when you buy a new PC it comes with it.
I use Norton , as it was with my new PC ...but I still have to regularly update it at their website as there are always new Viruses and Worms being produced by idiots with nothing better to do
Melody - Try going to Google.com and typing in Anti-Virus Software ;)