I found this, but I don't know how to do it for a Windows. There is no way to set up things like "Legacy mode", nor is the "Fast boot" option enabled. There are many reasons why you may need to reinstall GRUB: corrupted boot partition GRUB got overridden after Windows installation some unsupported Linux kernel parameters have been set in a GRUB configuration file and the system is not booting anymore but this can’t be fixed from a GRUB menu as it is not showing up, etc.
My BIOS has only 3 tabs: "Main", "Boot" and "Save and Exit" (Aptio Setup Utility - American Megatrends).When I was installing Manjaro, I had to use Rufus with the DD Image option.
It recognizes it, but it still won't boot so I can install it.
Format the drive in FAT32 and put a W7 on it.
Things I've tried to make it boot from the USB: I thought of fully resetting the BIOS, but I can't do it since my laptop (Innjoo Leapbook M100) doesn't have a CMOS battery and frankly, I don't think it's necessary since if I put Manjaro on a USB again, I can fully boot and install it, so it works fine. here XY is the number of your Linux distro partition. mount your Linux installed partition to some mount point. I've tried using different programs on another Windows machine to make the USB bootable with Windows and tried 4 ISOs using different partition types (MBR/GPT) and it still won't boot from it. First live boot to your Linux Mint system, using external Live CD/USB Drive, then follow these commands to re-install GRUB on MBR. Currently I have installed Manjaro, but have access to GRUB before loading the OS, my USB is recognized, but it won't boot from it, even if I manually select it.