Windows server 2008

I am getting error "you cannot logon because the logon method you are using is not allowed on this computer server 2008" after I renamed the computer and changed to a workgroup to remove from domain. After I reboot I could not login with local user account I created and shows up the error.
It is not pinging with the changed the name or the static IP address that assigned to device, so there is no way to connect to GMPC remotely
pchettriIT DirectorAsked:
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Did you delete the computer from AD then try rejoining the domain?  I mean , go into Active Directory, find the computer and delete.  Then try rejoining the computer in question to the domain again.
Lee W, MVPTechnology and Business Process AdvisorCommented:
So what exactly is your question?  How do you log back in?  How to rejoin AD?  Something else... You told us what happened but now what you need help with.

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pchettriIT DirectorAuthor Commented:
I get this error when I try to login as local user. Until I could login as local user there is not way to join back to domain. Do I boot with CD and reset seth file and login holding shift keys?
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Scott CSenior EngineerCommented:
Is there anything important or on this server?  If not, just rebuild it.  

 If there is something you need on it, do a parallel installation and get the data off then rebuild.

 It looks like something got messed up with the authentication, or the password was set up wrong.
pchettriIT DirectorAuthor Commented:
product key is something I do want to loose with that server
Lee W, MVPTechnology and Business Process AdvisorCommented:
You can try the UtilMan.exe trick to reset the administrator (or other user account) password.

For more information watch this 5 minute video:
(Video describes for DCs, but I've used it on non-DCs just fine; hopefully you'll see how easy this is and take proper precautions to ensure an unauthorized person doesn't do this - ie lock the server in a room and use bitlocker to encrypt it's data.
pchettriIT DirectorAuthor Commented:
found the password for administrator and it worked
pchettriIT DirectorAuthor Commented:
I've requested that this question be deleted for the following reason:

pchettriIT DirectorAuthor Commented:
found the password for administrator and it worked
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Windows Server 2008

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