Just ran across some excellent lists of free security scans and security sites.

Disclaimer: We have not tested most of the scans, so please use with care. Any scan that automatically makes changes in your computer should be used with due diligence.

Generally speaking, these online scans are very helpful as a second opinion and as a backup to installed anti-virus and anti-malware programs, and are highly recommended.

Links:

Maxthon Forum List

CastleCops List

“Practice Safe Computing”