Portmon.exe Error 2 [portable] -

If you have tried all of the above and still see "portmon.exe error 2," it is time to accept that the 32-bit kernel driver model is extinct. The best long-term solution is not to fix Portmon, but to replace it.

With the right plugins, it can monitor USB-to-Serial traffic. Serial Port Monitor (Eltima/Electronic.us): A robust, professional-grade paid alternative. Device Monitoring Studio: Another powerful tool for tracking data bits across ports. Termite or PuTTY: portmon.exe error 2

If you are running a 64-bit (x64) operating system, Portmon will likely never work natively. You have two choices: If you have tried all of the above and still see "portmon

In the world of legacy system administration and embedded device debugging, few tools have achieved the cult status of (PortMon.exe). Developed by Mark Russinovich and Bryce Cogswell, and later acquired by Microsoft as part of the Sysinternals suite, Portmon was the gold standard for monitoring RS-232 serial ports and parallel ports on Windows NT/2000/XP systems. Serial Port Monitor (Eltima/Electronic

Tools like Eltima Serial Port Monitor or Device Monitoring Studio are robust but often require a paid license.

Portmon Error 2 is a symptom of a legacy tool struggling to communicate with a modern operating system. While administrative tweaks and "Connect Local" tricks can keep it alive on older hardware, users on modern 64-bit systems are usually better off migrating to newer software designed for today’s security and architecture standards. Are you trying to monitor a physical serial hardware port USB-to-Serial adapter