I upgraded a couple of days ago from IE7 to IE8 after a prompt showed up on my desktop. After hours of locked pages, slow downloads and unsuccessful attempts to tweak the settings on my computer; I followed a suggestion on computer related board. I've uninstalled IE8 and reverted to IE7. Seems to be working fine.
I wonder if Microsoft is going to keep upgrading its products until all of them quit working entirely. Maybe they should move to SC along with Boeing.