If you are unable to boot into Windows after installing Linux Mint or any other distro on your computer, try updating GRUB, using Boot Repair, and adjusting UEFI settings.

Select “Install Ubuntu alongside Windows Boot Manager” and click Next. Any other option will either delete the entire contents of the drive, or require manual configuration, so take great care.

I am trying to install System Commander 7 so that I can install other OS's elsewhere. System Commander 7 is supposed to be able to install to and boot from NTFS drives in Windows XP/2000.