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Microsoft has released a patch to fix a problem that causes backups to fail and records Event ID 12293 on a computer running Windows Vista or Windows Server 2008.
If you try to perform a backup on a computer running Windows Vista or Windows Server 2008, the backup stops immediately after startup and the next event is recorded in the application log:
Event ID : 12293
Source : VSS
Message : Volume Shadow Copy Service Error: Error when calling a routine on a dummy copy provider.
If this problem occurs, apply Microsoft patch 263048.
No requirements are required to apply this patch to a computer running Windows Server 2008.
To apply this patch to a computer running Windows Vista, you must have Windows Vista Service Pack 1 (SP1) or Windows Vista Service Pack 2 (SP2) installed.
Visit KB972135 for details.
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