Tuesday, March 25, 2014

VSS event 8193 after installing DHCP on Windows 2008 R2

So it turns out that DHCP changes the permissions on the VSS registry key for some reason, and after installing it you'll get the following VSS error in the event log:

Log Name:      Application
Source:        VSS
Date:          3/25/2014 4:35:05 AM
Event ID:      8193
Task Category: None
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      DC3.hq.donohoe
Description:
Volume Shadow Copy Service error: Unexpected error calling routine RegOpenKeyExW(-2147483646,SYSTEM\CurrentControlSet\Services\VSS\Diag,...).  hr = 0x80070005, Access is denied.

The fix is pretty easy. Open Regedt32, go to 
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\VSS and give Network Service full access permissions to it.

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