I completed uninstalling and reinstalling. The issue persists. I am happy to share the system event log with someone in support. I suspect a dirty cache as the system boots successfully perhaps ten or fifteen times, then hangs. After the power-off reset, things work again until the next failure. This is a frustrating bug, as it affects many other services including DCOM and Group Policy. If they can't start, the system is unusable. In some cases, the login is successful but these other services and istrtsrv aren't running when viewed in the MMC.
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