Microsoft Fixes Remote Desktop Failures

Microsoft has resolved a known issue that prevented non-admin users from connecting to devices via Remote Desktop when the 'Administrator protection' security feature was enabled. The issue was caused by recent Windows updates, but has now been fixed with the release of the KB5127936 preview update on October 28, 2026.

The 'Administrator protection' security feature, which began rolling out in October 2025, prompts standard users to authenticate with Windows Hello (PIN or biometric) when they try to change the Windows Registry or install new apps. This feature is now enabled by default in organizations using Windows security baselines after installing the October 2026 Windows security update.

Microsoft acknowledged the issue on October 13, stating that Remote Desktop connections may fail with error 0xC000000D after installing the KB5124010 September 2026 non-security preview update on systems running Windows 11 24H2 and later. The issue primarily affects enterprise-managed remote devices used as Remote Desktop hosts with Administrator protection enabled, regardless of how the feature was enabled.

The company has provided a temporary workaround for users who don't want to install the KB5127936 preview update. IT administrators can disable the admin protection feature by resetting the 'User Account Control Type Of Admin Approval Mode' policy via Microsoft Intune or Group Policy. However, Microsoft recommends installing the latest security update for devices, as it contains important improvements and issue resolutions.

## Why it matters The fix is significant for organizations that rely on Remote Desktop connections, as the issue caused disruptions to remote work and access to critical systems. Microsoft has a history of addressing similar issues, having fixed a similar problem in March 2025 that caused Remote Desktop and RDS connection failures after installing Windows updates. The company also released emergency out-of-band Windows updates last month to fix Remote Desktop Services failures caused by the September 2026 security updates.

The resolution of this issue highlights the importance of staying up-to-date with the latest Windows updates, as they often contain critical fixes and security patches. With the KB5127936 preview update, non-admin users can now connect to devices via Remote Desktop without encountering errors, ensuring seamless remote access and productivity.