Bought open box HP Prodesk 600 G2 i5-6500 desktop preloaded with Win 10 64 bits with HP 805D motherboard. Created windows 10 32 bit installer on a bootable usb from microsoft windows media creation tool.Tried to clean install windows 10 32 bit by going into bios and choosing usb to boot & accepting legacy boot.Computer starts up, bypasses the usb boot and goes straight to hard drive boot. Same happens when I try to install windows 7 32 bit iso.