After doing a LOT of internet research, I can't seem to figure this out:

I take my laptop home, boot up, enter password, and hit enter.... forgetting to check the workstation only box. I then have to wait a few minutes before I get the "tree or server can't be found" box. Is there a way to shorten the time it takes for that error to come up? Is it possible to stop the client once it has started trying to connect to the server? I have tried to hit escape, ctrl-alt-del, etc. Nothing works, I simply have to wait until it times out in order to log into the workstation. Hopefully someone can help. Thanks!!