Grub2win Link -
: Shrink your existing Windows partition from within Windows Disk Management to create space for your secondary OS.
In simple terms: Grub2Win adds a boot menu before Windows loads. From that menu, you can choose to launch Windows, Linux, or even boot from an ISO file. grub2win
Your system returns to the original Windows bootloader with zero leftovers. : Shrink your existing Windows partition from within
GRUB2 (GRand Unified Bootloader 2) is a bootloader developed by the GNU Project. It is the successor to the original GRUB bootloader and offers many improvements, including support for modern operating systems and hardware. GRUB2 is widely used in Linux distributions, such as Ubuntu, Fedora, and openSUSE. you can choose to launch Windows