I was experimenting with booting Mint 8 KDE edition from a USB pendrive - went into BIOS to change boot order - no response from keyboard, started loading my normal Mint 8 (Gnome) but I pressed reset to abort. Next time I boot computer I get the grub menu but no response from keyboard. Try booting with a live Parted Magic CD - first screen will not respond to keyboard but after PM automatically loads keyboard (and mouse) both working! Shut down, boot as normal, but same problem. Any advice would be most welcome.