I would doubt that using AI would have contributed to your problem. For me Copilot has been priceless in my study of Windows Internals and C# programming. I use Copilot dozens of times every day in my work, and it's been invaluable in my learning.
I use Edge on my two computers, my iPad Pro, my iPad Mini, and my Pixel Phone. They all stay in sync perfectly. I attribute that to the fact that they all log in to the same Microsoft Account. I've always had only the one Microsoft Account.
I do use Copilot a good bit in my study of Windows Internals technicals and C# programming using Microsoft Visual Studio. Edge has been my only browser for five years and still no error messages with Edge on either of my two computers.
I run Windows completely clean with no hacks, and I don't...
If Microsoft Security (Defender) is healthy, up‑to‑date, and running normally, then you have no reason to run MSERT. MSERT is strictly an exception‑handling tool, not part of routine protection.