Cisco VPN Client Restarts XP

When connected to work through Cisco VPN Client connection, everything works fine until I DISCONNECT the VPN from work. It restarts my Windows XP.

I have check all the updates to ensure I am up-to-date. The only thing I can think of is something was installed on the computer that may have cuases this to happen. I have another machine that has VPN and it’s Win XP and it’s ok.
Has anyone run into this problem? I have uninstall everthing I can possible uninstall that I don’t need. The system is running Minimal applications.

Thanks!