Caps lock button does nothing

[AWS]

On my computer, the Caps Lock button no longer does anything.

 

Troubleshooting Steps:

 

* Swapped out several keyboards. Same problem with each.

* Tried virtual keyboard Caps Lock (does work, and even turns on the indicator light on the physical keyboard).

* Unplugged, replugged USB cables into different USB ports, and restarted. No change.

* Used Device Manager to check for driver updates. No updates found.

* Looked for USB / keyboard settings in BIOS to toggle. None found.

 

System Specs:* Dell SK-8115 keyboard

* Windows XP Professional 5.1.2600 Service Pack 3 Build 2600

* Dell Optiplex 760

 

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