This computer could not authenticate with a Windows domain controller

I imaged a server running Sharepoint 2007. I powered the original down.

I copy the image to another like server and powered it up. Its been running for 3 months when accidently the other server which had the same image was powered up (and then immeadiatly down when it was discovered it was up).

Now I am getting all sorts of error:
This computer could not authenticate with \\domaincontroller.domain.org, a Windows domain controller for domain DOMAIN, and therefore this computer might deny logon requests. This inability to authenticate might be caused by another computer on the same network using the same name or the password for this computer account is not recognized. If this message appears again, contact your system administrator.

I am unable to log in using any domain account - I can only log in with the administrator account.

Whenever I go into Groups in the management console, they come up as S1-2-15 etc not the actual user.

GPEDIT.msc doesnt work - Gives me "MMC Could not create the snap-in."

The original server was powered down and decommisioned.

Any ideas?

Solution: This computer could not authenticate with a Windows domain controller

Well, it sounds like your SID is trashed. This usually happens when you clone things. The next time you image something like this be sure to run a SID changer. You can try to now, but I think that it is too late.

Delete the computer/server account from AD and join the Server back into the domain again. After you are back in the domain, be sure to move that server object to your correct OU.

HTH