Using the free verzion of the scan, I am having problems with popups that cause the scanner to freeze up or stall for hours. How can I get around the problem. I have tried using a pop up blocker and also turning it off along with ending everything else that I can find running. I am sure it's a virus, but cannot get the scanner to run in front of the continuous pop ups.
You might also try booting into safe mode with networking, then try using the Windows Live One Care safety Scanner or Trend Micro Housecall - http://housecall.trendmicro.com/