Solve : When I start windows, I log in and there is a black screen!?

1.	Solve : When I start windows, I log in and there is a black screen!?
Answer» This morning, I started my computer up like normal, then something popped up at the bottom SAYING to "keep blocking" or "unblock" itunes. I unblocked it cause i thought it was HARMLESS but then my computer started getting really slow then it froze. I restarted my computer and logged in. This took an abnormally long TIME to boot up and while it was logging in, it said "preparing your desktop". When it finished logging in, there was a black screen and all i could do was see and move the mouse and open task MANAGER. I then restarted it in SAFE mode and ran AVG but while it was scanning, it said that some files were locked and could not be scanned like C:Programfiles/Desktop or something like that. Now i dont know what to do cause i can't get back on regular windows.System Restore.

Discussion