How To Use Portmon Best

: To use Portmon today, you must run it inside a 32-bit Windows XP/7 Virtual Machine (such as VirtualBox) with COM port passthrough enabled, or switch to modern alternative sniffers like the Electronic Team Serial Port Monitor or Device Monitoring Studio . Step-by-Step Guide: Configuring and Running Portmon Portmon - Sysinternals - Microsoft Learn

⚠️ On first run, PortMon will ask to install a kernel-mode driver. Click Install . If you get a "Driver not signed" error, you are likely on a 64-bit OS. You will need to disable Driver Signature Enforcement temporarily or switch to a 32-bit OS/VM. how to use portmon

Here is what a typical capture looks like: : To use Portmon today, you must run