I decided to put Windows 10 back on my laptop so I could work on something that requires an actual Windows install. The guides online all looked scary, so after looking around I found out it\’s really easy on a modern laptop.
- Reboot and go to bios.
- Change the boot order to have Debian first.
- Save and boot into Debian.
- In Debian, go to the command line and run the command \”sudo update-grub.\”
- Reboot and note that Windows is listed on the grub menu now, but Debian is first.
That\’s literally it. It was that simple. This was on a T470s that previously had Debian 11 installed on two partitions (separate installs). I deleted the one I never use with Gparted, then installed Windows on that partition. Then I did the above to get back to being able to go into Debian.