This afternoon I was noticing some popups from an unfamiliar browser (most of them are Mozilla popups, I use IE but my son uses Mozilla), and went to the Control Panel/Add Remove Programs to see if there was any strange programs installed. I noticed "OIN". I googled it, not knowing what it was, and found your (great!) site advising someone else of problems removing the program. I went back to see if I could do a simple uninstall, but then could not open the Control Panel. It started to open, but then I got the "Windows Explorer has encountered a problem and needs to close. We are sorry for the inconvenience" message. I sent the error report to MS, then got prompted to install the Windows XP Service Pack 2, which I did. 45 minutes and 3 reboots later, however, I still can't open Control Panel. (In the meantime, I think I did remove OIN, guided by information on your message board. I think it's been on my computer for awhile and is probably unrelated to this problem.)
Any suggestions? Sorry for rambling.
Thanks very much,