I recently had the msblast worm, but I don't know if it had anything to do with this. I can't install anything now, but had the infection weeks ago. I tried to install service pack 2, but the window just closes up in the middle of the process. And there wasn't any error message, it just closes suddenly. Someone told me about the Watson problem but I found it wasn't the deal. This happens to all install programs, and some installed ones like Zone alarm. The windows just disappears after a minute or two. I tried closing all virus scanners and programs but no good, and using windows 2000. Any help on this is appreciated, cause I really need to install service pack.