Unable To Install Grub Bootloader

Hello everyone. Hopefully, you are all well. This is my first post in this forum. I hope I will get a better suggestion from you. Guys, I need help with my computer. I am using OpenMandriva Lx and windows10 in same PC. After updating Windows, the grub bootloader is removed somehow. I am unable to install the Grub bootloader. Although, I am not an expert on this matter. Can anyone provide any suggestions? Any help will be appreciated.

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Let’s assume you have modern computer with EFI.
Then if all work perfectly before Windows update, then open BIOS settings and change boot order selecting OpenMandriva to load first.

boot with USB live openmandriva
open a terminal and return

sudo efibootmgr -v

Thanks for replying and the suggestions also. Already I figure out the after finding this on Google. I just repaired the grub file with the help of the link. Now the issue is fixed.