Instruct: Classify the given review into positive or negative sentiment.
Query: F Keys (F1-F12) on Keyboard Function Sporadically

The mouse functions perfectly, but the F keys (F1-F12) on the keyboard rarely work. I searched Logitech's troubleshooting forum and found that I am not the only one who has this problem with this model. Logitech suggested connecting the receiver to a different USB port, which worked twice for me, but has never helped since. Now the F keys do not work at all. This is terrible for me because I need the F keys for games. Also, I can no longer startup while holding F8 to bring up the startup menu and disable driver signature enforcement to make some programs work (such as PeerGuardian 2) with Vista 64-bit. Looking back, I would definitely buy a different mouse+keyboard combo.