For those with legitimate copies of Windows
You may want to check this out, its a freeby
http://www.microsoft.com/security_essentials/?mkt=en-gbTook 12 hours on Dialup to download the program and the Virus and Spyware data base though.
So far no conflicts with any other Virus checking progs we run. (AVG. Spy Bot, Scotty and Windows Defender) Belt AND braces! (and a length of string too!).