W2K will always ask for a password if the Users and Passwords Control Panel is set as such.
This password has nothing to do with the Mac side of the house. It is purely internal within W2K.
Currently, it would seem that the Users and Passwords Control Panel is set to "Users must enter Username and Password to log on"

Somewhere in the setup of VPC and the installation of W2K, the password was set. If you have the version of VPC that came with W2K already installed, check the users manual for this problem. It may be that there is a "generic" password to allow for first time long on.

Good Luck

P