I may be late to the dance on this one and I am probably not the only one. Panda Security’s popular free antivirus, Panda Cloud Antivirus has passed Microsoft’s quality checks and is now Windows 7 certified for both 32-bit and 64-bit systems. 
About Panda Cloud Antivirus: Panda Cloud Antivirus is the first antivirus especially designed to offer protection from the cloud. It safeguards users from new malicious code practically in real time as all processes take place on the Internet, minimizing any impact on PC performance.
Panda Cloud Antivirus was launched on November 10, 2009.
Panda’s Collective Intelligence servers have analyzed 91.280.828 viruses and known goodware. Panda Cloud Antivirus connects to Collective Intelligence in real time. You can check this out live by visiting the Collective Intelligence Monitor here.
Download your free Panda Cloud Antivirus for Windows 7: http://www.cloudantivirus.com/en/
Check out all Free Antivirus Programs.
is this compatible with windows xp ?
Marcel,
They have a version for XP as well. I am not sure if you can use the Win 7 version for XP.
The version work fine on XP. I already tested it.
Arafat,
I appreciate the share and hopefully everyone will get on board!
Its been years since am using computer , till the day I havent found a perfect antivirus, let try the panda this time, again some new claims but then a new virus will come everything will be washed.