Win10 cannot update due to failed dual boot install which changed the boot record and I cannot fix

[Entropy-man]

Win10 on a Toshiba Satellite Pro 1TB HDD.. In May 2022 I dual installed Linux Mint and got a GRUB menu to boot either Win10 or Mint from that time Win10 updates could not be installed. I used Mint terminal commands to change the boot order and put USB Memory on top followed by Win10 then Ubuntu. Result was I trashed my ability to boot into Mint but Win10 worked ok. I tried to fix Mint boot with bootrec etc and failed. I saved all my data. I found I not only could Win10 not update but certain newly installed software designed to repair the Win10 boot record like AOMEI would not open also Dosbox

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