Local Policy Settings

I am running a Win2k upgrade from 98 that was installed by a previous NetAdmin who no longer is in contact with the company. When I set the machine to logon to the network, it restarted, and now no matter how I log on, it tells me that the Local Policy will not allow for Interactive Logon. I have tried disconnecting the Machine from the network and logging on, and logging on to the local machine, instead of the network. Is there any way to recover this without reinstalling the OS?