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How do I remove a workstation from a domain when the domain controller is no longer available?

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Last Modified: 2012-05-06
I am only able to log in as local administrator (it won't let me log on as any other user since the DC is unavailable). This is a Windows 2003 R2 server. The "Change" button is greyed out in Control Panel --> System --> Computer Name tab, so I can't click it.  The domain controller and the entire domain has been decommissioned and this one machine got overlooked.

The other answers I've seen on this site assume that the Change button is available.  
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The account you used to log on does not have enough priv to do what you want.  Change button is greyed out if the account does not have the full administrator privs.
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Commented:
Jaydee: I'm logged in as local Administrator.  What priviliedge do you think I need which it doesn't have?  
Igor: Thanks, but what is sysprep?  I tried to run that and I don't have it installed on my computer.
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Commented:
The SysPrep tool is a bit intimidating but it did the trick!
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