System State backup error

Query:    Active backup destination: File Media name: “Small Business Server Backup (02).bkf created 03/10/2009 at 06:37” Volume shadow copy creation: Attempt 1. “Registry Writer” has reported an error 0x800423f4. This is part of System State. The backup cannot continue. Error returned while creating the volume shadow copy:800423f4 Aborting Backup. ———————- The operation did not successfully…