Navigate to: . Find Turn Off UDP On Client and set it to Enabled . Restart the Remote Desktop app. 6. Registry Fix (Last Resort)

If the above fails, you can manually reset the RDP security provider via the Registry.

Ensure all rules for and Remote Desktop (UDP-In) are enabled (look for the green checkmark). 5. Disable UDP for RDP (Group Policy)

Navigate to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server\WinStations\RDP-Tcp Find the SecurityLayer DWORD.

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