do this. Read the mobo booklet and check for the CMOS jumper. Pull the main power plug from the motherboard and then change the CMOS jumper from pins 1,2 to pins 2,3 for about 19 seconds then replace the jumper back to the original position. That resets the bios to default settings. Now using the PS2 adapter plugged into the PS2 connection for the keyboard. Boot your system. It should work without any problems then. Unless you have one of those multimedia keyboards that won't work without the drivers.