I have downloaded some patches and restarted the server as on post here suggests but I'm still getting this error. I'm using a Windows 2003 SBS
Backup Status
Operation: Backup
Active backup destination: File
Media name: "IncreamentalDailyBackup.bkf created 21/05/2013 at 12:00 AM"
Volume shadow copy creation: Attempt 1.
Error returned while creating the volume shadow copy:0x8004230f.
Error returned while creating the volume shadow copy:8004230f
Aborting Backup.
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The operation did not successfully complete.
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