Can we use WUBI or something like it to install Ubuntu in 2021 without bricking our Windows install?

Boot Ubuntu on UEFI computer without USB or CD or GRUB

• Create FAT32 partition 3GB to 11GB, depending on the need for persistence.

• Copy/Paste contents of ISO file to new partition using 'Files' or 'Archive Manager'.*

• Reboot pressing F12 and select UEFI Ubuntu.You will be offered the choice to boot Ubuntu.

• You can add a "writable" file up to 4GB and a "home-rw" file up to 4GB if you want persistence, (the ability to save data between sessions).

To create persistence file:

sudo dd if=/dev/zero of=casper-rw bs=1M count=512
sudo mkfs.ext4 -F casper-rw

• (Replace 512 with the "size in MB" you require, max 4000)

• For Ubuntu 20.04 and later replace casper-rw with writable

• For a home-rw file replace casper-rw with home-rw

• If you don't use persistence the Live frugal install of Ubuntu never writes to disk and can not wear the SSD out.

*If there is any problem opening the ISO file, Install 7Zip in Windows or P7zip in Linux.

This method does not work on BIOS/Legacy only Computers