Portmon Windows 11 [hot] Jun 2026

serial port - Sysinternals' Portmon: Error 2 - Stack Overflow

Same error with v3. 02 but the PortMon v3. 03 works learn.microsoft.com/en-us/sysinternals/downloads/… Pierre Jean. – Pierre Jean. Stack Overflow

Using Portmon on Windows 11 is relatively straightforward. Here's a step-by-step guide to get you started: portmon windows 11

The VM’s virtual hardware tricks Portmon into thinking it is running on a compatible OS. However, this is heavy-handed and not recommended for real-time debugging.

Here’s a feature idea for a tech article or video titled: serial port - Sysinternals' Portmon: Error 2 -

Using Portmon on Windows 11 offers several benefits, including:

Portmon was last updated in 2006. Because it relies on a legacy 32-bit driver to intercept port traffic, it does not function natively on 64-bit versions of Windows. Since Windows 11 is exclusively 64-bit, the original Portmon.exe will typically fail to start or fail to capture any data. Why it fails: – Pierre Jean

Windows 11 is blocking the driver because it is not signed or you lack admin rights. Fix:

Installing Portmon on Windows 11 is a straightforward process:

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