Two nights ago I tried booting Ubuntu off a USB drive after I upgraded to Windows 8.
This sent my computer into some weird panic mode, and it took me three hours to get Windows to boot up properly. Windows was working fine until last night. It was then stuck on the login screen for 45 minutes.
I tried restarting because I thought the system just hung, but the same thing that happened a couple nights ago happened again — I left it running all night as I was sleeping and it wasnt able to boot up until 9 AM this morning (11 hours!).
Is this because I tried booting Ubuntu? How can I solve this problem?