Update: For Windows 11 termsrv.dll modifications, please visit the following page. Option 1 – Modifying termsrv.dll In order to have concurrent user sessions working in Windows 10, you need to make small changes to termsrv.dll file. This file is located in C:\Windows\System32 folder. Before modifying termsrv.dll for the first time, you need to take the ownership and assign yourself full permission
