WIN7 Upgrade SP1 black screen prompt error code 0xc0000034

　　WIN7 SP1 system appears black screen solution one:

When the computer is powered on, press the F8 on the keyboard, go to the Windows 7 Safe Mode interface, then select Advanced Startup--Repair your computer, select System Restore in the system Recovery option, and then select the one you want to restore by listing the restore points, and view method two if you have not previously done system Restore.

　　WIN7 SP1 system appears black screen solution two:

1, the same access to repair computer options, after entering, select the command line, in turn, enter the following command line;

Reg Load Hklmbasesystem C:windowssystem32configsystem

Reg Delete "Hklmbasesystemcontrolset001controlsession Manager"/V SetupExecute

Reg Add "hklmbasesystemcontrolset001controlsession Manager"/V setupexecute/t REG_MULTI_SZ

Reg Unload Hklmbasesystem

2, after the completion of the command to restart the computer problem can be solved.