You need audio drivers. If you have an add-on sound card then get them from whoever manufacturers it. If it is onboard sound you get them from the motherboard manufacturer.
You can get details by examining the above components, or (depending on the state of the system) by looking in Device Manager.
If you are in a fix it would be best to start your own post, as your requirements are different to that of the original poster, it results in confusion and you are less likely to get focussed help.
By the way, I trust you realise that by putting your email on the internet you are inviting spammers engines to find it - you will then get junk email forever. You can send a personal message to the original poster by clicking on his/her name.
Ms Hulot's boat