Fix Volume Shadow Copy Service Acccess Is Denied Error

How to fix the VSS error complaining about access being denied. Event ID 8193 Source VSS

This event will appear in Event Viewer with the following Details:





This error usually just occurs on Windows Servers that have the DHCP Service installed and running after VSS was configured, when the DHCP service is installed it modifies the permissions on the following registry key but neglects to re-add the NETWORK SERVICE user:


To resolve the error mentioned above, simply right click the above 'Diag' registry key folder, select Permissions and give the NETWORK SERVICE the below permissions on This key only, and Full Control on all Subkeys only.

Permissions for the Diag folder (assign these via the Advanced security dialog option seen when selecting Permissions as above):

  • Query Value
  • Set Value
  • Create Subkey
  • Enumerate Subkeys
  • Notify
  • Delete
  • Read Control

You can then go back to the Permissions dialog and add the aforementioned permissions for Full Control

You should no longer see these errors in Event Viewer.