In my experience, Windows only fucks-up your Linux bootloader if they both share the same EFI System Partition. Keeping them separate fixes the issue. Though, this means that you’ll have to install Windows first, since it will automatically pick your Linux ESP otherwise.
Yup and adding a password to the BIOS was recommended to me by some sysadmin online. Don’t know how that specifically helps but haven’t had problems since.
lelgenio
pogodem0n