TrendMicro Free Online Virus Scan:
http://housecall.trendmicro.com/ (http://housecall.trendmicro.com/)
Symantec Free Online Security Check (Virus + Security Scans):
http://security.symantec.com/sscv6/home.asp?j=1&langid=ie&venid=sym&close_parent=true&plfid=23&pkj=OKJGYHGBYNCJEIMXQKC&bhcp=1 (http://security.symantec.com/sscv6/home.asp?j=1&langid=ie&venid=sym&close_parent=true&plfid=23&pkj=OKJGYHGBYNCJEIMXQKC&bhcp=1)
AVG Virus Checker (downloadable Free Virus Checker + other security software):
http://www.avg.com/ (http://www.avg.com/)
Avast Free Virus Remover:
http://www.avast.com/eng/avast-virus-cleaner.html (http://www.avast.com/eng/avast-virus-cleaner.html)
Spybot Search and Destroy (Antispyware):
http://www.safer-networking.org/ (http://www.safer-networking.org/)
CCleaner:
CCleaner is a freeware system optimization, privacy and cleaning tool. It removes unused files from your system - allowing Windows to run faster and freeing up valuable hard disk space. It also cleans traces of your online activities such as your Internet history. Additionally it contains a fully featured registry cleaner. But the best part is that it's fast (normally taking less than a second to run) and contains NO Spyware or Adware! :)
http://www.piriform.com/ccleaner (http://www.piriform.com/ccleaner)
a-squared (anti-trojan, etc.):
http://www.emsisoft.com/en/software/free/ (http://www.emsisoft.com/en/software/free/)
Ad-Aware:
Other products are at this site for virus, firewall, etc.
http://www.lavasoft.com/products/ad_aware.php (http://www.lavasoft.com/products/ad_aware.php)
Hitman Pro (Anti-Malware):
http://www.surfright.nl/en (http://www.surfright.nl/en)
SuperAntiSpyware:
http://www.superantispyware.com/ (http://www.superantispyware.com/)
Comodo Internet Security:
http://www.comodo.com/home/internet-security/free-internet-security.php (http://www.comodo.com/home/internet-security/free-internet-security.php)
Malwarebytes:
http://www.malwarebytes.org/ (http://www.malwarebytes.org/)
Hope you don't mind me adding these to your list, they're free and not to bad. I use them myself. :)
Not at all...add till your heart's content. LOL I use Commodo too.
Actually, that you've added yours I see I need to clean up a few of those.