My PC (self built with Asus motherboard) was a Linux-only machine until I added a fresh install of Win10 on a separate drive using Ventoy. I use Linux Mint 95% of the time and want to automatically boot into Linux, preferably without showing GRUB. I have Fast Boot turned off, and I keep resetting the order in BIOS only to have the PC automatically boot right into Windows. How do I stop Win 10 from overrriding everything?
I would consider just putting windows in a virtual machine, depending on your use needs. That’s been my solution to stop windows messing up my boot. I actually just have it on an external ssd.
Works well since I don’t play pc games and don’t need great pc power for what I do. 16gb of ram so plenty to share with the VM; for my use performance is great. I rarely need windows anyway.