Remote Desktop Fails for Non Admin Users Error 0xC000000D After Update
Admins can still connect, but standard users are rejected with error 0xC000000D after the recent Windows updates — and the host has Administrator protection switched on. Microsoft lists this as an open known issue. Here is the workaround.
🎥 Watch the full video — fixing Remote Desktop problems caused by a Windows update, step by step
This one has a very recognisable pattern. After the September 2026 preview update KB5124010, and still with the October security update KB5127648, Remote Desktop connections to a Windows 11 host can fail for non-administrator users with error 0xC000000D when Administrator protection is enabled on the host. Administrator accounts connect normally, which makes the problem look random until you know the pattern. Microsoft carries this in the known issues for the recent updates, and the listed workaround is a temporary change on the host — not a permanent fix, and this guide will say so plainly.
Remote Desktop Connection
Administrator accountCONNECTS
Standard user accountFAILS
Error code0xC000000D
Host feature involvedAdministrator protection
The signature of this issue: same PC, same network — admins get in, standard users do not.
1
Confirm the Pattern Before Changing Anything
Test with an administrator account to the same host — if it connects, your network, firewall and RDP service are fine
Test with the failing standard user — note whether the error shown is 0xC000000D
On the host, check Settings, Windows Update, Update history — this issue is reported since KB5124010 (September 2026) and is still listed with KB5127648
Confirm Administrator protection is enabled on the host — open Windows Security and check the Account protection area, where its status is shown
If all four match, it is this known issue, not your configuration
2
Apply Microsoft's Temporary Workaround on the Host ⭐
The workaround Microsoft lists for this known issue is to turn off Administrator protection on the host PC until a permanent fix ships. This is a deliberate, temporary security trade-off — read the warning after the steps.
On the host PC (the machine people connect to), sign in with an administrator account
Open Windows Security, go to Account protection, and open the Administrator protection settings
Turn Administrator protection off and restart the host if Windows asks for one
Ask a standard user to connect again — the 0xC000000D failure should be gone
In an office, the same setting can be controlled centrally by policy, so one change can cover all affected hosts
3
What Not to Do
Do not make every user an administrator just to get them connected — that removes far more protection than the workaround does, and the diagnostic above already proved the accounts are fine
Do not uninstall KB5127648 as a first reaction — it is a cumulative security update; the host-side toggle above achieves the workaround without losing October's security fixes
Do not open extra firewall ports or reinstall Remote Desktop — the admin test in Fix 1 already proved that path is healthy
4
Close the Loop When the Real Fix Arrives
Keep installing the monthly cumulative updates on the host — Microsoft has this issue listed as open, and the permanent fix will arrive through Windows Update
After each update, test one standard user connection with Administrator protection re-enabled on a test host
Once standard users connect with the feature on, turn Administrator protection back on everywhere — it is a genuine security feature, and the workaround was only ever meant to be temporary
⚠️ Security honesty: turning off Administrator protection lowers the host's defences against privilege abuse while it is off. Apply it only on hosts you manage, note the date you applied it, and re-enable the feature as soon as Microsoft's fix lands. That trade-off is exactly why Microsoft labels this a temporary workaround, not a resolution.
🎥 Watch the Full Video on Update-Broken RDP
The full video covers Remote Desktop breaking after a Windows update and the complete recovery method, on a real system.
Why do administrator accounts still connect while standard users fail
Because the fault sits in how the host validates a non-administrator logon token while Administrator protection is active. Administrator logons take a different path, which is why the admin test works — and that contrast is the fastest way to recognise this exact known issue.
Which updates are linked to the 0xC000000D Remote Desktop failure
Reports and Microsoft's known issue tracking tie it to hosts running the September 2026 preview update KB5124010 or later, and it remains listed with the October 2026 security update KB5127648 on Windows 11 versions 24H2, 25H2 and 26H2.
Is turning off Administrator protection the final solution
No. It is the temporary workaround Microsoft lists for this open known issue. The final solution is a fix delivered through Windows Update. Re-enable Administrator protection on the host once standard users can connect with it switched on.
This guide is based on the known issue tracking for KB5124010 and KB5127648 and the Technical Anshu video above • Stuck on a step? Ask in the video comments and the community will help 🙏