https://www.xda-developers.com/microsoft-wont-update-windows-11-these-apps/
StartAllBack was just the beginning.
Considering all the Bloatware that Microsoft has been pumping out lately (don’t get me started or Outlook), this may be a good excuse to get a Radeon Graphics Card.
If I can be guaranteed that installing this software will prevent having to deal with CoPilot, I would jump on that straight away.
Bad news, I have an AMD card and still got the copilot button. It's probably a very specific version of the software that is an issue.