And Trend Micro has their free Housecall service - http://housecall.trendmicro.com - I usually recommend it as a first run anytime someone tells me "my computer is acting funny"...
I'm sure there are as many services as there are people on this forum, and we've all got our pet favorites.
As a side note, you can run Microsoft's Malicious Software Removal Tool's full scan from the command line. Just make sure you have the most current one. You'll see the date in the title bar. Its all in Episode 180 of Security Now. [
podcast] [
text] I highly recommend listening to Security Now on a regular basis.