windows\system32\config\system missing or curropt

Resolution :

Method1 : Copy the Registry from a backup using the Snapshot method.

Boot to Recovery Console
CD \ >> <Enter>
CD SYSTEM~1 >> <Enter>

If you get an error "Access Denied" Try Step1 or continue with Step2

Step1:
REN C:\WINDOWS\SYSTEM32\CONFIG\SYSTEM C:\WINDOWS\SYSTEM32\CONFIG\SYSTEM1
Exit >> <Enter> The system will restart
Boot to Recovery Console
CD \ >> <Enter>
CD SYSTEM~1 >> <Enter>
continue with Step2

Step2:
CD _RESTO~1 >> <Enter>
DIR
(There would be a list of folders like RP1, RP2, RP3.. etc. Look for the second highest numbered RP folder. For e.g. if highest is RP33 we would work with RP32. OR there is also a column next to the folder name you can also choose a folder with the date you want to restore the system to.)
CD RP** (where ** is the folder number, for e.g. RP32)
CD SNAPSHOT
COPY _REGISTRY_MACHINE_SAM C:\WINDOWS\SYSTEM32\CONFIG\SAM (If Prompted to overwrite, type Y and hit <enter>[for all copy commands])
COPY _REGISTRY_MACHINE_SECURITY C:\WINDOWS\SYSTEM32\CONFIG\SECURITY
COPY _REGISTRY_MACHINE_SOFTWARE C:\WINDOWS\SYSTEM32\CONFIG\SOFTWARE
COPY _REGISTRY_MACHINE_SYSTEM C:\WINDOWS\SYSTEM32\CONFIG\SYSTEM
COPY _REGISTRY_USER_.DEFAULT C:\WINDOWS\SYSTEM32\CONFIG\DEFAULT (don’t forget the dot(period) before default)
Exit >> <Enter>

Method2 : Copy the Registry from the repair folder.

Boot to Recovery Console
CD \ >> <Enter>
CD WINDOWS >> <Enter>
CD REPAIR >> <Enter>
COPY SAM C:\WINDOWS\SYSTEM32\CONFIG\SAM (If Prompted to overwrite, type Y and hit <enter>[for all copy commands])
COPY SECURITY C:\WINDOWS\SYSTEM32\CONFIG\SECURITY
COPY SOFTWARE C:\WINDOWS\SYSTEM32\CONFIG\SOFTWARE
COPY SYSTEM C:\WINDOWS\SYSTEM32\CONFIG\SYSTEM
COPY DEFAULT C:\WINDOWS\SYSTEM32\CONFIG\DEFAULT
Exit >> <Enter>