I have an IBM Thinkpad. I hooked a cordless keyboard and mouse combination to my computer. Now when I unhook it I can't get my laptop keyboad to work on the keys that have numbers on them. I tried fn+numloc but this does not work. Any suggestions?

After unhooking a device, power-off then power-on the PC to ensure it recognizes only the attached peripherals. If the problem persists, enter hardware setup (F1 or F2 during power-up) & check the keyboard settings.