Symptom:
Task Sequence fails with 80091007 error code.
Cause:
This error indicates that the files on the DP for one of the packages referenced by your task sequence does not match the hash that was obtained when the package was imported.
Fix:
The easiest way to see which part of your Task Sequence is causing the problem is to open the SCCM Console and go to Site Database > System Status > Advertisement Status > then find the advertisement status for the task sequence that failed.
In the details windows, right click on the Site name and choose 'Show Messages > All'.
This will show all the status messages for the Task Sequence advertisement from which you can spot what the problem is:
In the above screenshot we can see there is a content mismatch issue with the driver package.
As a result we need to get the hash values to match up. Easiest way to do this is to use the Manage Distribution Points Wizard to try refreshing the boot image package on all distribution points. Once this is done update the distribution points.
Be sure to "Refresh DPs" and then do "Update DPs". With a bit of luck this will have resolved the issue!
Sidenote:
Refresh Distribution Points: this forces the content to be redistributed to the distribution points.
Update Distribution Points: when you run this the DP will check the version number it has against the version number of the package on the site server. If they match up the DP will not perform the update
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