If you have Windows 7 you should post your question in that area:
http://answers.microsoft.com/en-us/windows/forum/windows_7
.
Also...if dealing with viruses, then loading 4 different anti-virus programs will usually cause more problems than solve. Hopefully two things:
1) They were bonafide anti-virus programs and not just some adware/malware masking as an anti-virus
2) You fully uninstalled one before installing the next
.
In any event, repost your question in the Windows 7 area.
Good luck