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System related files not backed up by VSS

Article ID: 67
Last updated: 13 Jul, 2012


During a backup some Windows system files are not being backed up by the Backup Client, for instance



This happens because Windows specifies files that must not be backed up in the following registry key:


For details see

The backup client filters out these files from any backups done by VSS.  According to Microsoft these files should not be backed up and is not required for restore.

A typical example of the registry entry looks like this:


This is intended behaviour and does not require a fix.

Article ID: 67
Last updated: 13 Jul, 2012
Revision: 1
Views: 3130
Comments: 0
Posted: 21 Jun, 2011 by Marais D.
Updated: 13 Jul, 2012 by Marais D.
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Article 66 - Using signed SSL certificates for WebAccess     Article 68 - Snapshot backups fail with long encryption keys