My son’s Windows laptop did the same. Turns out there is a setting to make Windows truly shut down when selecting “shut down” from the menu, because normally it secretly sleeps or hibernates or something to have faster start-up times. There’s also the power another device via USB option that you may have to disable in BIOS / EFI settings.
I remember I had over one hundred floppies to install it all. And those were just for the stuff I was interested in. This was circa 1996. I bought Red Hat 5.0 a year or so later. It came on 4 CD-ROM’s and was cheaper than that pile of floppies had been.