Troubleshooting Guide: Remote Desktop Error 0xC000000D After Windows Updates
Troubleshooting Remote Desktop Error 0xC000000D After Windows Updates Troubleshooting Guide: Remote Desktop Error 0xC000000D After Windows Updates Identify, mitigate, and validate a known Windows 11 issue Overview Microsoft has confirmed a Windows 11 issue that can prevent non-administrative users from establishing Remote Desktop connections when Administrator protection is enabled on the remote host. The issue occurs after installing the September 22, 2026, non-security preview update KB5124010 or later updates. Affected connections may fail with error 0xC000000D and the message: The token that was passed to the function is invalid. Microsoft has documented a temporary mitigation. This guide explains how to identify potentially affected devices, verify the relevant configuration, apply the workaround cautiously, and validate the outcome. Important: This is a troubleshooting procedure for a specific known issue. Do not change security policies unl...