Avast Free Antivirus
This is an outstanding program, and best of all, it's free for personal use. (There is a paid version with more features.)
Here's a review of this software.
AVG AntiVirus Free
Here is another program that is free for personal use - so, there's absolutely no excuse to leave your computer unprotected!
Check out a review of this software.
Check Point ZoneAlarm Free Antivirus+
ZoneAlarm Free Antivirus+ combines a superior firewall with antivirus protection licensed from Kaspersky.
Read a review of this software.
ADinf Anti-Virus Software
This is a shareware program (with a nominal cost after the first 30 days) that you use along with virus-protection software. It takes snapshots of your computer and compares them to prior snapshots. This would be very handy if your computer suddenly started to misbehave. Be sure to check this tool out.
Symantec Free Virus Scan
Scans your computer and lets you know if virus or malwares are present. Clears all your suspicious cookies found in
your computer for free! Download it here.
Needless to say, try any software from this list at your own peril, and remember that it's always a good idea to backup your system before installing anything new. There are lots informative sites listed here, but if you know of any other good ones, please contact us.