looking for the best free antivirus windows?
Regarding free antivirus I would check out Avira AntiVir Personal or Avast antivirus. Stroll on over to http://filehippo.com/software/antimalware/ to check out the anti-malware.
You should also get these:
http://filehippo.com/download_spybot_search_destroy/
http://filehippo.com/download_malwarebytes_anti_malware/
http://filehippo.com/download_winpatrol/
To see how the various antivirus products stack up in real world tests look no further than av-comparatives.org
http://www.av-comparatives.org/en/comparativesreviews