can’t log on interactively

I have a Windows 2000 server and a Windows 2000 Professional workstation. Last Friday I installed the lastest critical updates from Microsoft onto both and now I can not log into the W2K Professional machine. The message reads “The local policy of this machine does not allow you to log on interactively”. I get this regardless of whether I am logging into the domain or workstation, as my user or administrator. I have checked all of the system group policies for the log on locally right and addedpermission to my user with no positive results. I even disconnected my NIC cable and rebooted and I still can not log into the workstation. I am truly stuck. Does anyone have any ideas? Thanks