|In Safe Mode try this:|
Start > Run > chkdsk /r > Y > ok
Restart and allow CheckDisk to Check and hopefully Repair any issues.
Ideally it will then go to Normal Mode
If you still cannot get to Normal Mode, try uninstalling your Video Card hardware in Device Manager
Start > Run > devmgmt.msc >ok
In Device Manager locate your Video Card and Remove it (by right clicking on it and selecting remove/delete/uninstall)
Restart again, and then allow Windows to re-install your Video Drivers, or download the most up to date Video Drivers from your Manufacturer Support site (preferred)
I hope this helps :)
nVidia Video Card Drivers: http://www.nvidia.com/Download/Scan...