Computer does not find mint bootloader

[eekie64]

I have installed Win 10 and Mint 20.2 at different disks and placed the windows and mint bootloaders at the windows disk,putting the standard startup at windows with grub-customizer. That worked fine, but all in a sudden the bios does not find the mint bootloader. However when I start from the ubuntu bootloader partition at the win disk it works like before. I don't grasp this! However I had to recover the windows disk from a backup recently. May be the bootloader section belonged to a different edition of Mint. How can I reinstall the Mint bootloader from my present Mint? Or is there a more simple solution?

[spamegg]

It says to use Timeshift, or reinstall: https://easylinuxtipsproject.blogspot.c ... mizer.html

[JeremyB]

The one listed as ubuntu is the Mint boot loader