by zlyc » Thu Oct 08, 2009 10:25 am
Go into Device Manager on your computer and find your keyboard, uninstall it and reboot your computer. After your computer turns back on it should automatically find your Keyboard (I'm assuming your keyboard is USB / Plug 'n Play?) then it should reinstall it.
Try that, if reinstalling your keyboard doesn't work, maybe you should find a new driver for your keyboard online.