In case I notice that my keyboard is not working, I will follow the procedures mentioned below:
• I will shut down the computer, and check whether the keyboard is properly connected to the port;
• If it is not properly connected or the connection is found loose, I will refix it and turn on the computer again;
• I will clean up the virus running anti-virus software;
• If the problem is not fixed yet, I will then install a new keyboard.