Overlay1404 Its probably an issue I can't really delve deeper into until the next time I need install GOS
Understandable, but you can play with adb and fastboot with USB debugging enabled to determine if USB drivers for the problem PC are complete and working.
Make sure adb and fastboot are the newest available. Currently you want Platform Tools 36.0.0 released in April. If it's 36.0.0-13206524 from March (or older) you'll have problems with Android 16.
https://developer.android.com/tools/releases/platform-tools
Even when using the web-based Android Flash Tool, it's a good idea to first run 'adb devices' to verify the USB connection. Likewise for fastboot mode except run 'fastboot devices'. If USB drivers are working and adb and fastboot see the device, output will be the Pixel's serial number and you're ready to run flash-all.bat.
Edit: flash-all.bat or Android Flash Tool