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The Joys of Computing

Multiple concurrent Remote Desktop session for Win 8.1: Overwrite System Files

19 October 2014

I usually patch the Remote Desktop service to allow multiple simultaneous connections.But trying to do so on Win 8.1 results in an error message: “Access denied: You need permission to perform this action.”. The solution is to take owner ship of the file…

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First, get the patched RDP service termsrv.dll here.
Then, take owner ship of the existing termsrv.dll: takeown /f C:\Windows\System32\termsrv.dll
Next, grant you access on that file: cacls C:\Windows\System32\termsrv.dll /G <YourAccount>:F
As termsrv.dll is currently loaded, rename it into “-termsrv.dll”
Finally, copy the patched file into C:\Windows\System32\
Restart the PC.