Allowing Remote Desktop connection without using a password

Sometimes Windows user accounts do not have a password, which can pose a security risk and will lead to issues with Remote Desktop, causing refused connections despite being properly enabled.

Usually, the error message looks like this:

Remote Desktop Connection

A user account restriction (for example, a time-of-day restriction) is preventing you from logging on. For assistance, contact your system administrator or technical support.

To resolve this issue, we need to change the “LimitBlankPasswordUse” registry:
0 = enable blank passwords
1 = disable blank passwords

Steps

1. Open the Command Prompt as an administrator:
   Press “Win + R” to open the Run dialog, type “cmd” and press “Ctrl + Shift + Enter“.

2. The following command will enable blank passwords over the network:
   Reg.Exe add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa" /v LimitBlankPasswordUse /t REG_DWORD /d 0 /f

3. Following that, you’ll be able to establish an RDP connection to the remote PC without a password.