If your Windows keyboard lacks a numeric keypad, you can still enter the copyright symbol by enabling Num Lock and using a combination with the 'Alt' key plus letter keys that correspond to numbers. For example, activate Num Lock and press 'Alt' followed by 'MJO9,' assuming 'MJO9' mimics the numeric sequence '0169' on the keys under Num Lock mode. This method may vary slightly based on keyboard layout, but generally, the combination will work.