gnomo223 Windows always find's a way to mess with your other system
My experience has been the opposite - Grub is my bugaboo. Grub always seems to try to take over the entire boot process. I've found a way to successfully triple-boot (Windows Boot Manager, Linux Boot Manager and Grub (Ubuntu Budgie)), but the process entails installing each when one and only one drive (the target drive) is in the computer during installation. Tedious, and requires a boot from the BIOS/UEFI Boot Menu, but none of the boot managers know that the others exist during installation or boot (as far as each is concerned, it is the only operating system on the computer), and it stays stable because neither the Windows Boot Manager or Grub can take over the boot process for the others.
As far as I am concerned, installing on separate drives, entirely independent of each other, is the only way to aboid trouble long term. Otherwise, forget it.