in BIOS, set your planned new OS source as boot device e.g. DVD/BR/USB
Boot to that and simply format the partition where you have your Win10 and install the new OS.
Win10 can never forbid this!
in BIOS, set your planned new OS source as boot device e.g. DVD/BR/USB
Boot to that and simply format the partition where you have your Win10 and install the new OS.
Win10 can never forbid this!