I upgraded from Windows 8 to 8.1 preview, and then Windows started to tell me to activate Windows in "Change PC Settings". However in "Change PC Settings" -> "Activate Windows" page I get error code: 0xC004F012: The Software Licensing Service reported that the call has failed because the value for the input key was not found.
In event log, I get this event:
The Software Protection service failed to start. 0x80070005
6.3.9431.0
Provider: Microsoft-Windows-Security-SPP
EventID: 1001
I tried to start the service manually in services.msc, and got Access Denied.
I used process monitor to see what's happening, and found sppsvc.exe is trying to delete this key and got Access Denied:
HKLM\SYSTEM\WPA\8DEC0AF1-0341-4b93-85CD-72606C2DF94C-6P-17
Then I opened regedit, made sure the sppsvc and Network Service accounts have full control over this key, and restarted the service, still got Access Denied. Then I tried to delete this key manually in regedit, and got this error:
Cannot delete 8DEC0AF1-0341-4b93-85CD-72606C2DF94C-6P-17: Error while deleting key.
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