I have Windows 8, and none of the metro UI apps were working, so I downloaded a registry fix from Microsoft. I ran it, and during that time I ran Windows Update. I restarted the PC, and after the boot screen with the Windows 8 logo, it never showed the lock screen, just a black screen.
I force restarted the computer several times, checking whether the problem still occured and it did. I attempted to fix this problem by running my windows installation disc. I clicked Repair, Troubleshoot, Advanced Options, then system restore, as I had a backup from a few days ago.
A window popped up:
To use System Restore, you must specify which Windows Installation to restore. Restart this computer, select an Operating System and then select System Restore.
After encountering this error, I tried to refresh and reset my pc. The error message for Refresh PC:
The drive where Windows is installed is locked. Unlock the drive and try again.
So I cancelled, and tried Reset PC. Error message:
Unable to reset your PC. A required drive partition is missing.
I have not made any changes to the hard drives recently, unplugged them or any physical changes to the computer. I have access to CMD from the repair disc.
Can anybody identify the problem, and how I can refresh by unlocking the hard drive, or use System Restore?