STOP: c000021a { Fatal System Error } the initial session process or system process terminated …

Error:
STOP: c000021a { Fatal System Error } the initial session process or system process terminated unexpectedly with a status of 0x000000001 (0xc0000034 0x0010038c). The system has been shut down
What went wrong:
Windows7 automatic upgrade to windows10, restart the computer after the beginning of the first step “file copy” process, because to be eager to use the computer, but the replication speed is very slow, waited for almost three minutes to copy 1%, the operation interface and there is no return or undo options, so I decided to force a shutdown. Then the tragedy, boot again, after the display of boot animation will enter the blue screen mode, blue screen display error as above.
try safe mode entry and system recovery will not work, keep going into this terrible blue screen mode.
this is obviously a software error, not hardware related. And the system handler error (abnormal termination), copy 1%, the problem should not be serious.
through PE, can enter the disk and access all the contents of the system disk.
Check the files under the system32 directory of the system disk, found that not many files have been changed, the generated log files are not affected, and several files under C:\Windows\System32\config have been changed.
Solutions:
Copy C:\Windows\System32\config\RegBack to C:\Windows\System32\config

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