To make Network Access with Blank Passwords with Vista

In Vista, by default it does not allow network users to access the computer without a password, Although you can log in locally without a password.,

To change this setting:

1. Click on start-->Run-->type ' gpedit.msc'
2. Click on computer configuration on left panel.
3. Double click on 'Windows settings' then open 'security settings'
4. Open 'Local policies' then open 'security options'
3. Right click on Accounts- Limit local account use of blank passwords to console login only and go to properties.
4.In the options Just Disable this option