Do you remember "Wubi Ubuntu Installer"? This project is both a replacement and an improvement of Wubi. You will be able to install your Debian (or derived) distribution on a PC without repartitioning it, simply by using a secondary/external boot device (like a USB drive).
linux
usb
systemd
boot
shutdown
loop
loopback
grub
wubi
ntfs
usb-devices
grub2
usb-drive
dracut
initramfs
usb-stick
boot-partition
paragon
ntfs-3g
ufsd
-
Updated
Dec 8, 2021 - Shell