I've got an Asus expertcenter d700sa-xb501 desktop that I bought not long ago hoping to install kubuntu on it like I had on my old Dell computer. The Asus has Windows 10, with secure boot, fast boot on it. It's also an M.2 nvme ssd. After disabling secure boot and fast boot, I still couldn't get it accept Kubuntu. I think its got something to do with grub from what I've read. Anyway, I finally had to give up and I ended up installing Kubuntu on an external ssd by first creating an installation medium on a flash drive and to use it I have to boot my windows to the login screen, then hit shutdown, turn the cpu back on and go into bios settings and change my boot order to the external ssd. Then it works fine but if I go to the bios screen the first time I power on the computer my external ssd doesn't show up in the list. Just thought I'd let you know the trouble I had with it, but maybe you'll have better luck.