Microsoft Malicious Software Removal Tool checks your computer for infection by specific, prevalent malicious software (including Blaster, Sasser, and Mydoom) and helps to remove the infection if it is found.
This tool will help to remove specific, prevalent malicious software from infected systems. Because computers can appear to function normally when infected, Microsoft advises you to run this tool even if your computer seems to be fine. In addition to using this tool, you should use an up-to-date antivirus product to help protect your computer from other malicious software.
Reviewing 4.12 (Sep 12, 2012)
As I already use some pretty decent anti-malware this has never found anything amiss on any of my PC's - If you take the time to read the terms & conditions it's probably of more use to MS to have a bit of a snoop around your PC as anything, I can live with that though & seems harmless enough to me.
BTW although I don't use MSE the detection rates are now pretty good.
Reviewing 4.11 (Aug 14, 2012)
I don't know if it's useless or not, I guess it's worth having it as an extra check.
Anyway, installing latest version before patch Tuesday like today prevents updates from not only installing it, bun running it, saving an extra 10 minutes or so, for those patching on-line. The application is always served minutes before the patch is released: eat well :)
Reviewing 4.8 (May 9, 2012)
oh please this is as worth less as windows will now check for a solution when something crashes
Reviewing 4.8 (May 8, 2012)
They often issue this to remove rootkits or other malware that is otherwise very difficult to detect and remove. Rootkits, after all, can hide from any security software while the OS is booted. I applaud Microsoft's introduction into the security market with this and MSE. This tool basically will take care of any essential threat that need be pushed out due to the infection rate, or implications.
Reviewing 4.7 (Apr 10, 2012)
I'm pretty sure all this does is check and see if your Windows version is genuine.
I downloaded the Malicious Software Removal Tool on Friday and it ran for over 20 hours on Saturday. It kept displaying file names that began with "client", a bunch of letters and numbers and ended in".xml". After 20 hours I hard booted the PC as it seemed it would never stop. I can't find those files anywhere on my PC. The symptoms of malware are that my hard drive constantly is working. Task Manager says I have 96% t0 98% of the system available. Any ideas here?