Microsoft Security Sweeper

You have been directed here to download and install the beta version of Microsoft Standalone System Sweeper Beta, a recovery tool that can help you start an infected PC and perform an offline scan to help identify and remove rootkits and other advanced malware.

Here is another Microsoft virus remover. I am uncertain how it differs from "Saftey Scanner" but it is worth a shot. 

Ubuntu 11.04 Don't Bother

Ubuntu 11.04 is a total piece of crap. The two machines that ran v 10 well can't run 11.04. I won't go into all the gyrations it goes through but I won't waste more time on it. How did they ever let this thing out the door. I have not installed to hard drive but only tried to run from USB.

Xbuntu 11.04 runs from a USB stick fine.