nirovi

I'm currently having an issue with a computer that I just installed a new motherboard into. I knew after installing it I would have to reactivate windows. Well I clicked on the user and it asked me to activate, but once the machine came up into the windows environment it gives me the message that Windows is already activated, Click OK to exit. Once you do that it kicks you back into the user login screen. Im trying to find a way out of the loop. I have already tried deleting wpa.dbl out of system32 as well as trying a new administrator account. Any Suggestions?