In Vista Workstation you can create a new user and password using all characters of a keyboard. Vista Workstation allows creation but when you try to login to Workstation you get a login error.
- Vista Workstation
Using characters in the password field that Vista does not recognize.
Don't use the following characters in a password for users: ! @ # $ % ^ & * ( ) - = + , < > ' " ? \
The following special characters can be used in the password field: _ . / :