computer passwords

From: brad (soulfly2504@yahoo.com)
Date: 09/30/02 

From: "brad" <soulfly2504@yahoo.com>
Date: Sun, 29 Sep 2002 21:31:08 -0700

hi, i am in a dorm room and need to find a way to put a
password on my computer so there is no way for my roommate
to sneak into my computer. is there a way for me to put a
password on so that even if he hits the restart button
there is no way for him to reach my desktop? if so,
please send me instructions on how to get that set up. i
am using windows milenium edition.

thank you,
brad