A smart computer user is always worried about malware.
You can find several good on-line (free) virus scans that will confirm
whether your hard drive is clean or not (beware, they may find the malware in your quarantine folder).
More importantly, you should download, install, and update one or two anti-spyware applications, since spyware can be even more intrusive and certainly just as harmful to your computer as are viruses and trojans. The best two such applications are Ad-AwareSE and Spybot Search and Destroy.
You should also have a resident firewall installed, and make sure you have installed ALL Microsoft security patches.
Here is an excellent Tutorial about keeping your computer safe:http://www.bleepingcomputer.com/tutorials/keep-your-computer-safe-online/
Edited by jgweed, 22 October 2005 - 02:48 PM.