Keyboards (espeically today's keyboards) are universal as far as you can plug any keyboard in and it should work like a keyboard should. Now, it is possible you did get two bad keyboards, but not likely. I would take it out and try another port and see if any change. If not, I would try to reset the bios to "optimal defaults" as a starting point - see if that resets the keyboard to normal use. Restarting the machine may also cure this. I can't imagine they made a function in your OS or on the keyboard that would deliberately cause this lag feature to kick in. Perhaps your keyboard port is bad? Have you tried a USB and a PS/2 keyboard?