I have a Win 7 PC which I did some basic maintenance: updated and scanned for viruses (AVG), malware (Malwarebytes), and MS updates. Worked fine. When I shut down it finshied installing and update and the next day it wouldn't boot. It tried to recovery and said it couldn't repair the issue with an 0x0 error. Figuring it might be virus or mbr I tried a few options (below) and none worked. All you can back to is the recovery options and none work.
Tried and didn't work:
Safe mode - networking, non-networking
last know good config
restore - listed the Win 7 update from the previous day, looks like it does it, doesn't work and when I go back to restore the same recovery point is listed
Command prompt - boots to X - can't change to c so can't fixmbr or chkdsk
Since I can't get into windows I can't run another virus check - it did find a rootkit the day before however that was cleaned up after the scan was run.
This is in a client's office and they need those files/PC asap. If I can get a few things to try when I go back to that PC