[Adhortator]

I did some searching and couldn't easily find a solution to this problem, here... So here it is.
My PC has Windows 10 and Mint 20 Cinnamon in different disks. It was booting Windows 10 before I installed Mint. No dual boot because I didn't go for manual partitioning.
I could try and get it to start from Windows 10 again, and reinstall Mint, this time doing things right, but I trust there is a simpler way. I'm having difficulty finding it!
All help is welcome.
Thanks.

Edit: attached & posted some info on my system.

Boot Info Script 71f6c5c + Boot-Repair extra info [Boot-Info 16mar2020]


============================= Boot Info Summary: ===============================

=> No boot loader is installed in the MBR of /dev/sda.
=> No boot loader is installed in the MBR of /dev/sdb.
=> libparted MBR boot code is installed in the MBR of /dev/sdc.

sda1: __

File system: vfat
Boot sector type: FAT32
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files: /EFI/ubuntu/grub.cfg /efi/BOOT/bkpbootx64.efi
/efi/BOOT/bootx64.efi /efi/BOOT/fbx64.efi
/efi/BOOT/grubx64.efi /efi/BOOT/mmx64.efi
/efi/ubuntu/grubx64.efi /efi/ubuntu/mmx64.efi
/efi/ubuntu/shimx64.efi /efi/ubuntu/grub.cfg

sda2: __

File system: ext4
Boot sector type: -
Boot sector info:
Operating System: Linux Mint 20
Boot files: /boot/grub/grub.cfg /etc/fstab

sdb1: __

File system: ntfs
Boot sector type: Unknown
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files: /Windows/System32/winload.exe

sdb2: __

File system: ntfs
Boot sector type: Windows 8/2012: NTFS
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files:

sdc1: __

File system: ntfs
Boot sector type: Windows 8/2012: NTFS
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files:

 

[wmorri]

Hi, part of me wants to tell you to just reinstall because there isn't a super easy way to go about this. However, if you are still interested in sticking with your install the way you have it you should be able to do grub repair from your Linux Mint live disk or however you installed Mint. If you need some help with that I would look at Grub2 Repair. Basically you will be repairing grub so that it looks for your windows hard drive to boot off of. If you have any questions about anything in the article just ask and I will help you.