file is a core system component responsible for managing Terminal Services. By default, it contains code that checks your Windows version and enforces session limits—usually limiting non-server versions to just one remote user and server versions to two administrative sessions.

In , the default RDP stack allows only two concurrent administrative sessions (e.g., for remote management).

If you prefer to patch the file directly, you must take ownership of the file first to bypass system protections. : Open Command Prompt (Admin) and run: net stop TermService Take Ownership : takeown /F "%windir%\system32\termsrv.dll" /A

If you prefer not to use third-party executables, you can patch the binary yourself using a Hex Editor (like HxD).