|If the system doesn't have PS/2 ports, the USB keyboard would HAVE to be enabled by default. And I don't understand why you'd think a wireless USB keyboard would work when a wired one did not?|
You don't need to take the battery out for 2 weeks to reset the BIOS. All you need to do is unplug the power cord, move the Clear CMOS jumper from it's normal position to the 'Clear' position, wait a second or 2, then move it back again. That's all there is to it.
Make absolutely sure you unplug the power cord 1st...if you don't, it's very possible the BIOS will not reset.