Cannot access Windows 10 host using RDP after uninstalling Norton

Question

After uninstalling Norton, I lost access to a Windows 10 host using RDP. Currently using TeamViewer to logon. RDP displays an error:

"Your Remote Desktop Service session has ended, possibly for one of the following reasons"

I didn't change anything at all other than uninstalling Norton with NRN (Norton Removal Tool). What happened?

Obviously every Windows endpoint has a builtin firewall. You need to check those settings to ensure it is configured correctly, and to confirm the endpoint is listening on port 3389. — Greg Askew, Apr 13 at 6:02
@GregAskew Everything is fine with the ports. The problem is not the ports. When I try to connect it shows Configuring remote session then an error message Your Remote Desktop Service session has ended, possibly for one of the following reasons. — Andy, Apr 13 at 21:10

Andy · Accepted Answer · 2023-04-14 04:43:43Z

I reinstalled Norton, then uninstalled it again. The problem persists. What I did next:

Open windows local group policy editor (press “Windows” + “R” to open Run window, input “gpedit.msc” and click “Enter” to open Local Group Policy Editor)
Disable Local Computer Policy > Computer Configuration > Administrative Templates > Windows Components > Remote Desktop Services> Remote Desktop Session Host > Remote Session Environment > Use WDDM graphics display driver for Remote Desktop Connections
Enable Local Computer Policy > Computer Configuration>Administrative Templates>Windows Components>Remote Desktop Services>Remote Desktop Connection Client>Turn off UDP on Client > Turn off UDP on Client
Enable Computer Configuration > Administrative Templates > Windows Components > Remote Desktop Services > Remote Desktop Session Host > Connections > Allow users to connect remotely by using Remote Desktop Services
Restart computer

The problem is gone. What's happened, I still don't understand. But I currently have RDP access to the server.

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