July 1, 2004 Update:
I have to leave my computer on to monitor Web services. Today my computer was running incredibly slow, so I opened task manager and found ENTROP~1.EXE using 99% of my CPU resources and 53,567K of memory. ENTROP~1.EXE? Whet the hell is that? Did I install some spyware by mistake?
It turns out it was entropia.exe, the client for Fight AIDS @ Home. I changed the configuration so it will run only from 7:00 P.M. to 8:55 A.M.