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Backup fails in Windows 7 64 bit with Error Code: 0x80070002

    Question

  • I have looked at all the other posts about this problem, and none seem to appy to me.  The last few errors in my Application event log were:

    The backup operation that started at '‎2012‎-‎03‎-‎15T05:49:23.710392500Z' has failed with following error code '2147942402' (The system cannot find the file specified.). Please review the event details for a solution, and then rerun the backup operation once the issue is resolved.

    Volume Shadow Copy Service error: Unexpected error calling routine ConvertStringSidToSid(.DEFAULT).  hr = 0x80070539, The security ID structure is invalid.

    The backup was not successful. The error is: The system cannot find the file specified. (0x80070002).

    I'm running Windows 7 64 bit and backing up to an external hard drive. Backup has worked fine for many months before this. Help!

    Thursday, March 15, 2012 12:46 PM

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