- Click Start > Run > type ‘ regedit ‘ to open your Registry Editor.
- Find this key from right pane:
- If the ‘ Network ‘ sub-key does not already exist then create it (right click on ‘ Policies ‘ choose New and then Key, named it Network.
- Create a new binary value named 'MinPwdLen', and set the data to the minimum number of characters required for a password to be accepted.
This does not apply to existing passwords, only new or changed. Don’t forget to backup your registry before make some changes.