Disconnecting is good advice. What worked for me after windowa scrubbed the EFI boot was installing Linux and assigning its own EFI partition, most distros probe foreign OS so your separate Linux partition gets a chainloader entry to the windows EFI boot. You set BIOS to use Linux boot, Windows gets a handoff if you choose it in the Grub Menu and doesn't know about the other EFI partition. Kept my dual install save.