When removing the password of user account in Control Panel, it prompted that: Windows cannot remove the password. Password and/or account policies require the account with a password.
For Windows XP:
For Windows 7:
The above symptom may occur on the following systems:
Under the following operating systems:
Microsoft Windows XP
Microsoft Windows 7
The root cause is the installation of Port Locker.
When installing this software, it hints the password you’ve created will become your Windows password. Removing password will be prohibited.
To resolve this issue, you will need to uninstall Port Locker:
In windows XP, click “Start” --> “Control Panel” --> “Add or Remove Programs”
In Windows 7, click “Start” --> "Control Panel” --> “Uninstall a program” under “Programs” view by Category.
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