Removing unwanted VSS Provider.
1. Determine the unnecessary VSS providers:
Open an elevated Command Prompt and type: vssadmin list providers
2. Identify the unnecessary ones and use the registry to remove them as follows:
- Open Regedit
- Browse to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\VSS\Providers\
- Expand Providers and you should see three keys: Enum, and two GUID's (Long strings of letters and numbers).
- Click on the top GUID in the list and in the right-hand pane the Default string should have the name of the provider. If not check the other GUID.
- Once you find the right GUID export the whole GUID and export it so you can revert the operation if needed.
- Delete the unnecessary provider GUID subkey and close the registry
- Open Windows services and reboot the "Volume Shadow Copy" service. It may be stopped to begin with, that's okay.
- Check and see if the provider is gone from: vssadmin list providers
- (if needed) Reboot the server when next possible.
- (if needed) If for some reason you need to revert to the initial state, import the previously exported registry subkey and bounce the Volume Shadow Copy service