Go to Windows Explorer and navigate to C:\Windows\System32 and click on that System32 folder, it's contents will appear in the right-hand pane, scroll down until you see, or don't see, the KEYBOARD.DRV file, they are listed alphabetically. You might need to go to Tools > Folder Options > View tab and tick the little button which says "View hidden files and folders" and also untick the box which says "Hide extensions for known file types".
It's not a problem to do, Daibus. Go to Start > Run and type in "sfc /scannow" (without the quotes and exactly as shown), click OK and it will run through a check of all the system files to verify that they are there and intact. If it finds one missing, it will ask for the CD to replace it.
Do a search of your hard drive for the KEYBOARD.DRV file, Daibus, Start > Search > For Files or Folders, if it has been moved out of the System32 folder, copy and paste it back in. If that doesn't work, email me (by clicking the little yellow envelope icon beside my username) with your email address and I'll send you a copy of the file.