Re-registering The VSS Writers is the 2nd of 3 videos demonstrating how you can trouble-shoot VSS backup problems.
If you have viewed your event logs after a failed backup and discovered that you have VSS errors on your system such as a ‘Catastrophic failure’, your VSS writers may be unstable. Re-registering the VSS writers can often resolve these VSS related backup errors and return your system to a stable state.