That sounds like a solvable issue for me. The upgrade health check tells you exactly what prevents you from upgrading.
My system gets flagged as not applicable as wellndue to secire boot not being active. I could resolve it by enabling it, but since I still have an old MBT Id need to switch that aswell. Which I procastinate, as I won’t get nagged to upgrade to win11
I never completely reset everything in the last few years, although I upgraded some components and did some Windows reset. The MBR never was part of it…
Or greenshot, is also quite versatile