Hello , sorry about your problems. My name is Marco and I will do my best to help you.
Have you tried to reinstall the drivers?
To do so, follow these steps.
Right-click on the start button and select "Device Manager".
Then under "keybord" right click on the driver and click "uninstall".
Reboot the computer so that Windows reinstalls the default drivers.
You can reinstall the application with the link below. Choose if you have Windows 32 or 64. If it is a recent computer, it is probably 64.