Someone has recently clicked on some web site that has installed some type of spyware on a Windows XP machine using Internet Explorer 6.0 2600.0. First it changed the home page. That has been fixed. Now, IE runs EXTREMELY slow and you are constantly bombarded with pop-ads. I've run Spybot on the computer several times. It will find spyware and clean it off. I set it to scan again at restart and it gets a clean scan. Then, I open internet explorer and we're off to the races again. I can run spybot again and get a different set of spyware than what I had last time. I'm looking for some suggestions about what I need to do to clean this machine up..