i can boot my computer up in safe mode just fine. but when i try to log in normaly, it freezes up completely after i enter my password. once in a while my desktop will partially show, diplaying a display driver fail, but it said its been resolved.otherwise it just completely locks up, and rotates between my logon screen and a black screen. ive rolled back my driver software and reinstalled the updates. still, nothing.. and ive noticed when i boot up, my BIOS setting are cached and shadowed. does this affect it, and if so, how is it fixed??