What may be causing my keyboard not to work correctly?

A: Hello, sorry to hear about your keyboard giving you trouble. What you are experiencing sounds like an error with software. If you are able to safely restore your computer back to factory setting and are still experiencing problems with your keyboard, I suggest it is time to open it up and see if the internals are properly and securely connected. Review the replacement guide for the keyboard and and locate the keyboards connector ribbon under the keyboards bezel. Confirm that the connectors are all properly seated. If the keyboard problem still is occurring it is time to replace the old keyboard due to it most likely being faulty. Hopefully this information is useful to you and good luck!