How to recover or reset domain administrator password of DC running on windows 2008 R2 ?

I forgot the domain admin password of my DC. Even i don't know the DSRM password. How can i reset the domain admin password.
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vijaydawdaAsked:
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Lee W, MVPConnect With a Mentor Technology and Business Process AdvisorCommented:
There is NO NEED to download a third party boot CD.  Just boot to your Windows Server DVD or a Windows Vista/7/8 DVD.  

See Episode 105 of the Crack the Cred series here:
http://www.scorpionsoft.com/videos/crackthecred
And pay attention on how to prevent this in the future because while this will be handy for you today, it's a security issue that should be addressed - ENCRYPT your DC!
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Pradeep DubeyConsultantCommented:
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Sasha KranjacCommented:
Take a look at this solution How to logon using the expired domain administrator password in W2012 domain

This trick works way down to NT server, although slightly modified.
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vijaydawdaAuthor Commented:
Thanks for your valuable comments. Issue solved using renaming the utilman.exe to cmd.exe and using netuser command at logon.
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Lee W, MVPTechnology and Business Process AdvisorCommented:
Curious then, why did you select the answer that you selected - the Utilman trick was illustrated in the video I told you to watch?
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vijaydawdaAuthor Commented:
HI Lee,

I did not checked your video, because i resolved the issue before that time. But i appreciate your exact solution. Thanks for the support.
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Lee W, MVPTechnology and Business Process AdvisorCommented:
In my opinion, since I posted my comment BEFORE you posted your comment, regardless of how you found the solution, I should be credited with the answer.  Certainly not a post that was NOT in fact your answer.  (This holds true for any post - I don't know if it's a "rule" on EE - but I think it should be - if your solution was posted before you stated the issue was resolved, then the person who posted it deserves the credit).
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