try to go to safe mode, if you have OEM PC, try to access recovery image, do system restore at safe mode or recovery OEM OS
http://www.7tutorials.com/5-ways-boot-safe-mode-windows-8-windows-81
http://windows.microsoft.com/en-us/windows-8/windows-startup-settings-including-safe-mode
- Edited by britishdhez 7 hours 35 minutes ago
your PC OEM? means this OS comes when the first time you bought this PC( OS from manufactured)
You can ask the manufactured how to access recovery partition and do system restore there
Or if this PC using separate OS (you buy OS DVD), you can try in place upgrade or repair recovery health
http://support.microsoft.com/kb/2255099/id-id
- Edited by britishdhez 5 hours 50 minutes ago