@fribbledom I knew it was a good idea to scrub windows completely! https://steinar.bang.priv.no/2022/07/31/installing-debian-11-bullseye-using-pxe-boot-on-an-acer-aspire-5-a515-45-laptop/

Actually I didn't know... on previous laptops I almost never rebooted into windows anyway, so I just didn't want to waste the disk space this time around.

Also, scrubbing windows would save me having to mess about with having to preserve and resize the windows partition(s)