Apparently Microsoft have a bug in some of the logic that allows Windows to decide when to query group policies. Because group policies can affect themselves (effectively), there has to be a certain sequence of events to applying them. If this goes wrong Shit Happens. Symptoms are:

  • Event 1058
  • Event 1030
  • With Userenv debug logging on, you see lines like : USERENV(1d8.a84) 21:52:58:734 ProcessGPO: Couldn’t find the group policy template file <\\domain.local\sysvol\domain.local\Policies\{31B2F340-016D-11D2-945F-00C04FB984F9}\gpt.ini>,error = 0x5.

The fix for it is twofold:

Yes, this took a while to find and fix. Yes it’s bugged the hell out of me.

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