I have yet to find ANYTHING that is more effective then these four programs!
AND THEY ARE FREE!
Microsoft Security Essentials
(Make sure to get the free versions.... There is never a good reason to pay for virus protection)
The bulk of my business is virus removal.. I have installed these four programs on literally 100's and 100's of computers over the last 6+ years. If used proactively you should be able to remove most viruses, unless the infection is a RootKit type virus! If you get a RootKit and don't know what you are doing, most likely you will have to take it to a qualified shop like us!
I would suggest that you take your time installing these, by that I mean, READ each page of the installer. Remember these are free versions. They will want you to download a toolbar and or search engine so MAKE SURE TO UNCHECK THE BOXES (they are usually checked by default, so if you just click on through the installer you will get more than what you wanted!
Above is a direct download link from Piriform's website
Above is a direct download link from MalwareByte's website
Above is a direct download link from SuperAntiSpyware's website
Microsoft Security Essentials - FREE ANTIVIRUS PROGRAM
Either "Click" or "Copy and Paste" the Direct Link above to Microsofts website into your
browser to download the full standalone installer for Microsoft Security Essentials.