Hmmm. The bios settings you listed above all seem fine.
Regarding the ACPI question, its is normal for acpi not to have much info given next to it during this stage of the boot process. However, it should be assigned an IRQ.
To be honest, because your keyboard problem is clearly not a windows issue & you've already tried resetting the bios to default values etc, I don't think anything we try now is going to make much difference to the non-windows functionality of your USB keyboard.
Out of interest however, could you go to Start->Run & type devmgmt.msc
This will open device manager. If you notice any yellow exclaimation marks or red crosses on any devices, let me know.
In device manager, select the View menu & click on 'Show hidden devices'.
Next, select the View menu again, & click on 'show resources by type'. Expand the IRQ branch & let me know which devices are listed there & their respective IRQ number.
One other thought that has occured to me....have you tried the keyboard in any of the other USB ports on your computer? If not, I suggest you try this next & see of it makes a difference. (EG if you currently have the keyboards receiver plugged into a front USB port, then try a rear port instead).
Also, if you happen to have the receiver connected via a USB hub, then try connecting it directly to a USB port instead. If it's already connected like this, then you could try connecting it via a powered usb hub. NB, this is unlikely to make a difference so don't rush out & buy a powered hub, but if you already happen to have one (or can borrow one) then it may be worth trying.
BTW, if we do completely fail to resolve this problem, you can always buy a PS/2 to USB convertor instead. This will allow you to continue using your USB keyboard but connected to the PS2 port!