Backup Cannot Find Hklmback and Hkuback Files During Compare This article was written about products for which Microsoft no longer offers support. Therefore, this article is offered "as is" and will no longer be updated.
This article was previously published under Q146009 SYMPTOMS
When you use Microsoft Backup to perform a complete backup using the "Full
System Backup.set" file set, and then perform a compare operation on the
resulting backup set, you may receive the following error message:
Errors occurred during this operation. Do you want to view them now?
If you click Yes, the Error.log file is opened in Notepad, and lines that
contain the following text are displayed:
C:\<windows>\HKLMBACK ... Microsoft Backup cannot find this file. If
this is a network file, the network may not be available. Or, the file
Backup is looking for may have been deleted or moved.
C:\<windows>\HKUBACK ... Microsoft Backup cannot find this file. If this is a network file, the network may not be available. Or, the file Backup is looking for may have been deleted or moved. C:\Program Files\Accessories\Full System Backup.Set...Error: The file comparison failed. Files in the backup set and in the source are different. C:\Program Files\Accessories\LOG\ERROR.LOG...Error: The file comparison failed. Files in the backup set and in the source are different. CAUSE
This problem can occur if you perform the compare operation after you close
the "Full System Backup.set" file set. If you have configured Backup to
automatically compare files after each backup operation is performed, the
problem does not occur.
RESOLUTION
If the errors listed above are the only errors contained in the Error.log
file, the backup and compare operations were successful. The presence of
the errors listed above does not indicate a problem with the backup set.
To prevent this problem from occurring when you use the "Full System Backup.set" file set, configure Backup to automatically compare files after each backup operation. To do so, follow these steps:
MORE INFORMATION
When you use the "Full System Backup.set" file set to perform a complete
backup, Backup creates two temporary files called Hklmback and Hkuback in
the Windows folder. These files contain information that Backup uses to
rebuild the registry when you perform a restore operation using the
resulting backup set.
The Hklmback and Hkuback files are included in the backup set, and are removed from the Windows folder when you close the "Full System Backup.set" file set after the backup operation is finished. When you perform a compare operation on the resulting backup set, the errors listed above are generated when Backup is unable to find these temporary files in the Windows folder.
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