my previous bios updates were all fine in bios screen.

yeah these days asrock bios screen alone is already very user friendly. imo it's no point to risk anything, especially in bios updates.

that's nice. at least it didn't give you a chance to pull your hairs (it's painful) haha

also, if you wanted to play with usb settings in the bios, it's better to make sure you have a ps/2 keyboard handy (i think usb to ps/2 adapter should work also). i'm running ultrafast boot mode (w8.1 uefi mode. normally i go to bios via win+i), and my keyboards/mice are usb-based. with ultrafast mode, no usb devices are active until your os boots properly. i was stuck when i played with usb settings previously (just for fun, until it turned to something else lol) i unplugged the machine, left it alone for some time to drain power, and then tried jumper reset. nothing happened. (i thought it's supposed to work, resetting everything to defaults)

luckily i have an old ps/2 keyboard lying around, and managed to save the day

maybe the staff at the shop did tests and forgot to reset it to defaults before delivering it to you.

everything was ok here when i received mine.

Great news indeed. It should mean taichi is coming?