Você pode fazer uma restauração manual do sistema, isso pode corrigir o problema de inicialização.
A. Connect your non-bootable hard drive to another computer, as a secondary drive or use a usb adapter or enclosure. If you can see your data on the drive using Windows Explorer, back it up Now, then follow the rest of these instructions.
B. Open Windows Explorer. Click on Tools|Folder Options|View. Check the box beside "Show hidden files and folders". Apply your change.
NOTE D: may not represent the hard drive you connected to your PC, it may be E: or F: or G:, it all depends on how many other drives (including cd/dvd) you have in your PC, So subtitute the appropriate drive letter in the instructions below.
C. Navigate to the D:\System Volume Information folder. You will see a folder named something like _restore{.........} the dots represent an alpha-numeric sequence. In this folder you will see folders named RP0....RPnn. Find the one with the highest number. These are your System Restore points. In the highest numbered folder you will see a folder named snapshot. In this folder are registry hive files which you need to recover your system:
_registry_user_.default
_registry_machine_security
_registry_machine_software
_registry_machine_system
_registry_machine_sam
D. Create a subdirectory; i.e, D:\Windows\TMP. Copy these files to the TMP subdirectory. Rename them:
default
security
software
system
sam
Note Be sure to lose the period (.) in the file named _registry_user_.default
E. Delete the files in the D:\windows\system32\config subdirectory with the same names.
F. Copy the D:\windows\tmp files to the D:\windows\system32\config. subdirectory.
G.Put your drive back in its original system. Your system should start normally. If you get the same error repeat the procedure and choose another folder ( RPnn) (next highest number). You can repeat this procedure choosing lower RPnn numbers until you get it booting again
If you are denied access to any folders you will have to take "Ownership" of the folders first. http://support.microsoft.com/kb/308421