If you have problem to patch clients with SCCM and found the error code below in the WUAHandler.log, try to use this workaround. I've seen a couple of cases in my organization and this solution works.
Failed to Add Update Source for WUAgent of type (2) and id ({XXXXXX}). Error = 0x80004005.
OR
Software Update Error 0x80004005 on client systems
Solution:
1. Stop the SCCM service.
2. Rename the Registry.pol file
C:\windows\system32\GroupPolicy\Machine\Registry.pol to
C:\windows\system32\GroupPolicy\Machine\Registry.pol.old
3. Restart the SCCM service.
4. Run the Software update Scan cycle and Software Update deployment Evaluation Cycle in Configmgr Action tab.
And review the WUAHandler.log and UpdateDeployment.log.
You should see a progress in WUAHandler.log without error. Once Software Update scans completed, patches will be downloaded to your computer.
Try it out.
