|Not much into to go by. What computer? Desktop, Laptop? PS2 Keyboard? USB Keyboard? Wireless Keyboard? If USB or Wireless/USB then try different USB port... Not all USB ports are equally active on boot up, especially ports on an expansion card and ports going through a hub, but sometimes even front ports can also be a problem. Use only the rear ports directly on your motherboard for mouse and keyboard. If wireless, replace the batteries. If a laptop, try a USB keyboard to help diagnose the problem.|
If this does not help, try borrowing another keyboard (PS2 preferred) from another computer, a retired computer, or a friend.
After that, port more details for better help (generic questions can get only generic answers).
You have to be a little bit crazy to keep you from going insane.
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