How to check the Volume Shadow Copy Service (VSS) provider/writer status.
To check the VSS provider/writer status.
1. Open a command window. Click Start > Run and type CMD, and then click OK.
2. At the command prompt, type vssadmin list providers, and then press ENTER.
3. Confirm that the list shows Microsoft VSS providers listed as:
- Microsoft Software Shadow Copy provider 1.0
5. Confirm that all the VSS writers are showing:
- State:  Stable
- No error