Microsoft: Recent Windows updates may trigger Remote Desktop failures
Microsoft says recent Windows 11 updates can break Remote Desktop for non-admins when Administrator protection is enabled.
Microsoft confirmed that non-admin users may fail to connect over Remote Desktop after installing the September 2026 KB5124010 preview or later updates when Administrator protection is enabled. Affected systems include Windows 11 24H2, 25H2, 26H1 and 26H2; connections can return error 0xC000000D. The feature is enabled by default in the relevant Windows security baselines. Until a fix ships, administrators can disable Administrator protection through Intune or Group Policy.
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