In fairness, annoyed though I was, the command line message you get in Windows includes directions into the settings page to disable the feature, and any others like it while you're in there.
The real surprise was mostly that python3.exe isn't included in the 3.9.x download, despite the documentation mentioning it in a few places. Since the error message didn't name drop the executable, and it appeared python was otherwise installed and working (and even available as "python" on PATH) it took some sleuthing to locate the real issue. I'm sure there's a better fix than copying "python.exe" and renaming it "python3.exe" but that worked, and I had stuff to do, so it's fine. :)
