Hi,
windows update happened on my pc yesterday and i shutdown left it running as it was late and there was a lot of updates. This morning I booted and waited for the windows is configuring 77k items!!! Then the welcome screen appeared with no login box for my password, Ctrl/alt/del does nothing...
so i'm not actually sure that the update was responsible, but here goes.
i'm running build 7100 on a HP Compaq 8510w with 4GB RAM.
after the windows update of IE8, the next time i rebooted, win7 errored saying i couldn't login because my user profile was deleted or corrupt. then it cancelled...