Windows Upgrade Help and more

Same here. You could also try using the Media Creation Tool directly, as it sometimes bypasses the stricter checks the upgrade assistant runs.

You could also run a quick scan with Windows Defender, since background antivirus checks can sometimes cause that.

Got it, so which way are you leaning—just opening it, or having it auto-capture?

This happened to me too. I fixed it by running the Windows troubleshooter for Windows Update, which reinstalled a couple of files.