Easiest way to dual boot is 2 disks, with Linux and grub installed on 2nd disk, and BIOS set to boot to 2nd disk. That way Winblows thinks it is alone in the 1st disk of the system.
Even so had an issue a couple years back that Winblows messed up its own loader, by not placing the boot files in the reserved hidden partition but then configuring the boot as if it did… facepalm Took me a morning of trial and error figuring how Winblows boot to fix it…
Winblows is a cancer, but unfortunately it still is necessary for some gaming.
I tried running the games that I need Windork for some time ago, but got fed up tweaking the stuff. I’ll give it a try soon.
Btw, I only do PC gaming, no consoles or mobile.