Avast Free on Windows 7 desktop Avast Free on Windows 7 laptop Avast Free on WinXP/SP3 desktop
MalwareBytes Pro on all three
To the comment about false positives with Avast, I have not seen this with any of my machines. Over the past 5 years there have been perhaps 5 or 6, which is not unreasonable in my opinion. -- Politicians are the only people in the world who create problems and then campaign against them. (Charlie Reese)