Cubsfan

I think your only other option is if you have a telnet or ssh daemon running. There's various commands to shutdown the computer, like Jeff said, one comes with the W2K resource kit, but i'm sure there's more around. A quick google search takes me to:
http://www.experts-exchange.com/Oper..._10183579.html
Which is just a discussion about it with links.

Anyway, then you just need to telnet/ssh into your computer and run shutdown.exe, give it some options, and you'll reboot.

Reading over the messages, this all only applies if by "remote" you meant the computer that you're connecting from. If by "remote" you mean the computer that you're connecting to, then Jeff's right, you need to install something