Well it looks like your Mothers computers already have (sound drivers) installed, for if it didn't, you wouldn't be getting information like that. Maybe a simple little (up date) needs to take place. How long has it been since the computer was (up dated)? If that answer is unknown, than that's no biggy, just search the internet for your Mothers sound solution.
Maybe I can help out with this as well, what is the make and model of your Mothers computer? H.P., Compaq, IBM, Dell, Gateway, Asus, Sony.....ect., what is it? And a big help here would be knowing what type of computer processor the computer is using. For if it's an Intel family chip, normally Intel likes to use Intel for both processors and audio and video solutions when building it's computers.