omg thanks the fix worked. the panel loads and everything works like it did before!
i suppose this is because devices and printers also loads bluetooth related things, and since the bluetooth service is off, bluetooth doesn't work. So, the devices and printers panel is searching for a reply from the bluetooth driver
or w/e and it doesn't get it so it just never loads.
didn't think about this at first, but this seems to be the reason, and the above mentioned fix works great !