Howto enable concurrent Remote Desktop Sessions

1. Backup termsrv.dll via CMD.
   • Open a command window with administrative privileges, then execute this:
   • COPY "%SystemRoot%\System32\termsrv.dll" "%SystemRoot%\System32\*.*.bak"
2. Take Ownership on file via CMD.
   • takeown /a /f %SystemRoot%\System32\termsrv.dll
3. Grant administrators Rights on file via CMD.
   • ICACLS %SystemRoot%\System32\termsrv.dll /Grant Administrators:F
4. Patch the termsrv.dll (Require administrator rights. Right-click the exe file, select Run as Administrator)
   • If you do not already know where to find this patch file, you probably should not be doing this; consult your local IT expert.