No disc- windows 7 home premium was pre-installed on pc when I bought it... w10 seems to have forced its way on, despite trying to decline their upgrade nags
I went for the free upgrade, after much nagging from the sneakily installed reminder bot, on a laptop that came pre loaded with windows7..
I have found 10 to be sluggish, hard to navigate, and not easy to locate stuff in my folders.
Apparantly after x days, W10 'assumes' you're happy and so...