I came across a couple of old posts regarding issues with this monster that I've encountered. I too have recently seen it in a corporate environment with non networked PCs. SAS Free detects hundreds of bad registration entries for it, a bad file or two, etc., cleans them, and after reboot they are all back. Doesn't matter if it's run in safe mode to remove it or not. Whatever this thing is, it's a huge problem (just search the net). Anyhow, I have it on one of those PC's right now, and when I find out what the resolution is, I will post it. Symantec can't find it, Security Essentials either. There is no associated tool bar or program on the PC either.
I can't tell you how many times SAS has gotten me out of trouble, and I love it. But...it ain't working for this particular one. This one drags your PC speed to its knees.