Is Windows 2003 Volume Shadow Copy Service (VSS) update rollup package 940349 installed?
Backup applications for Windows rely on VSS for various Snapshot operations.
Rollup package 940349 resolves additional VSS errors and configurations not resolved with Service Pack 2 for Windows 2003.
Additional information and download of this update is available with the following link:
For more information on how each product works with VSS to create Snapshots, refer to the links under related documents.