Using the Winmgmt /resetrepository worked for me, and I wasn't seeing any errors when launching the msinfo32 I believe the WinMgmt command stops the service for you, as initially I had an error that there were dependencies to the service. When I stopped the service, which informed me there were two Dell services dependent on it, then I could successfully run the command. I hadn't checked if the WMI or Dell services had restarted, so hopefully nether of these were causing the GP failure.
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