How to Allow Network Access with Blank Passwords with Vista
Although you can log in locally without a password, by default, Vista does not allow network users to access the computer without a password.
To change this setting:
- Run gpedit.msc
- Go to Computer Configuration / Windows Settings / Security Settings / Local Policies / Security Options
- Double click on Accounts: Limit local account use of blank passwords to console login only
- Disable this option