It could be a short in the cable to the computer or maybe corrupted software. To use those extra keys requires extra software so I'd be inclined to uninstall it and then then reboot and then reinstall. As those extra keys can be changed to almost anything you want them to do I'd bet on a software problem. Run the software that's installed on it now and see what it's set on now. It's pretty straight forward to reset everything. Oh and make sure the plug to the computer is plugged in fully
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