Microsoft has released an antivirus/antispyware live CD that runs in the Windows PE environment called Microsoft Standalone System Sweeper. I wouldn’t use it as a full replacement for a Linux-based live CD from an antivirus vendor such as Bit Defender, which I’ve written about before. It is, however, a good supplement–a second opinion. Nothing catches everything, after all.
The idea behind all of these is to boot into a sterile environment to scan a dormant hard drive for things that evade or disable your normal antivirus software. The need for this grows just about every day, as there’s a lot of really nasty stuff out there these days. It’s not a substitute for normal antivirus software–it’s what you call on if and when normal antivirus software fails and a malware infestation prevents normal use of the computer.
