keyboard not working on snow leopard
Hello, I know that there is a thread about this but I really need the answer quick. I ordered the snow leopard to upgrade the iMac4.1 in my workplace. I got it and update it however that after installation I couldnt use the USB keyboard anymore. USB is connected and its even showing on the "More Info" in the about page and the mouse even works when its connected on the keyboard. I had a Apple Pro Keyboard and I need to fix this problem instead of buying a new one. Any ideas?
Note that im using a different computer to post this question
PS. how do I use the apple mac store?
iMac, Mac OS X (10.6.3), keyboard not working