Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I have a Windoer 2008 R2 RODC. It runs AD DS and DNS and that's it. The install is less than a day old.

Windows update hangs at "downloading updates" indefinitely, Server Manager errors on refresh with "The Remote Procedure Call failed. (Exception from HRESULT:0x800706BE)", the Windows System Update Rediness tool hangs on "searching for updates" and if I go into control panel and look at installed updates, it shows me that none are installed, even though there are at least 20 that I installed yesterday.

I figured, even if I can recover this server I don't trust it, so I was going to run DCPROMO and demote it, then unjoin it, format and reinstall and repromote. Unfortunately, when I run DCPROMO I get an error saying that it couldn't detect if Active Directory binaries were installed.

Everything in the event logs seems to reference RPC in one way or another. Has anyone seen this? Should I just format and reinstall? If so, is the procedure to delete an unrecoverable RODC the same as for a normal DC?

share|improve this question
up vote 0 down vote accepted

I ended up using ntdsutil to remove the RODC from AD and just reinstalled and promoted it again and everything was fine. It seems it was just a botched Windows install for some reason.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.