How to Fix VSS

Situation

A backup plan failed with one of the following error codes: 2405, 2422, 2415, 2416, 2417, 2418, 2419, 2401, 2402, 2404, 2407, 2409, 2410, 2425, 2412, 2411.

Managed Backup

Standalone Backup

Cause

These errors occur when there are issues with the Volume Shadow Copy Service (VSS) in Windows.

Solution

Run the fixVSS tool to automatically resolve VSS-related problems, using one of the following approaches:

• Pressing the Run the fixVSS tool link right in the error/warning message;

• Pressing the Run fixVSS button on the Management Console's Computers page > Edit Options for the affected machine > Advanced menu -> VSS sub-menu:

• Executing the following commands in the affected machine's elevated CMD (command line) interface:

cd "C:\Program Files\YOUR_COMPANY_NAME\Online Backup"

cbb.exe fixVSS

FixVSS tool: How it works

1. Stopping Services
   • Stops the Volume Shadow Copy (VSS) service
   • Stops the Microsoft Software Shadow Copy Provider (swprv) service
2. Re-registering Critical DLLs that VSS relies on:
   • Registers the core OLE (Object Linking and Embedding) components.
   • Registers OLE Automation support.
   • Registers the VSS Proxy Stub DLL.
   • Attempts to re-register the VSS service (though this is not a standard Windows command; it may be a script).
   • Reinstalls the Software Shadow Copy Provider DLL.
   • Registers the Event Class DLL.
   • Registers the Event System DLL.
   • Registers the Standard WMI Provider.
   • Registers the VSS UI component.
   • Registers different versions of MSXML (used for XML processing).
3. Fixing OLE permissions to prevent the "Unexpected error querying for the IVssWriterCallback interface" error.
4. Re-registering VSS Service and Restarting Services
   • Performs another attempt to register VSS (if the first one failed).
   • Starts the swprv service.
   • Starts the VSS service.