A friend of mine called and asked me to help her with a popup problem on her PC. I had no idea what I was about to get involved with. She's on Comcast DSL. I think the first mistake she made was not understanding how to properly close a popup (outmost perimeter X, NEVER hit a response button). Something has installed itself on her PC, and she now gets floods of popups, as many as thirty at a time, with the DSL physically unplugged! We installed the latest McCafee virus scan software, and it finds trojan horses that re-appear from nowhere after being deleted (still off-line, mind you). When trying to figure this out with Task Manager, I would find processes that would reappear instantly after deleting them. On one occassion, I went out and attempted to delete a suspicious .exe file, and the system went into shutdown mode, and I couldn't prevent it. I later killed the file. I have deleted all IE temp folders, history, cookies etc. I have painstakingly reviewed the Program Files, Windows and User directories, and cleaned everything that might even look slightly suspicious. No change. I've never seen anything like this in my 15 years of working with PCs. If I kill the IEXPLORE process, the windows all die off, and about 20 seconds later the whole damn process repeats itself. I'm about ready to put a few rounds into the center of the monitor. Short of reformatting the hard drive and starting from scratch, what tools are out there that might clean this up once and for all? Any suggestions? Thanks!