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Windows Server 2008 R2 Event 8193 – Volume Shadow Copy Service error. Unexpected error calling routine RegOpenKeyExW

(-2147483646,SYSTEM\CurrentControlSet\Services\VSS\Diag 0x80070005, Access is denied

See fix below.

Open Regedit

Navigate to HKLM\SYSTEM\CurrentControlSet\Services\VSS\Diag

Right Click the key DIAG and select permissions

Add user account shown in the event log and provide full permissions.

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