RDCMan stops working after installing the October 2025 CU (KB5066139) on Windows Server 2022

Maurice van der Werf 0 Reputation points
2025-12-01T09:57:09.3566667+00:00

Just noticed that RDCMan 3.1 no longer wants to start after installing the October 2025 CU (KB5066139) on Windows Server 2022. It complains about an incompatible version of mstscax.dll. Upgrading to RDCMan 3.11 (from November 11) and rebooting the server did not solve the issue. Any clues here?

Sysinternals
Sysinternals
Advanced system utilities to manage, troubleshoot, and diagnose Windows and Linux systems and applications.
{count} votes

Your answer

Answers can be marked as 'Accepted' by the question author and 'Recommended' by moderators, which helps users know the answer solved the author's problem.