OK, so now you realize that you've got some spyware junk on your system.
Before you go headlong into deleting suspected files or editing the registry, try this simple disabling technique.
First, see if you can determine what the offending files are. You can do this by running "msinfo32" if you're using Win98. I only have experience with Win98, so I don't know the corresponding run command for this "Microsoft System Information" utility in WinXP. Go to the "Software Enviroment" section and poke around to see if you can locate an offensive or out-of-place file that looks like it doesn't belong. Make a note of the filename and location.