Please explain in more detail. First, audio. How are your speakers and microphone connected to your computer? How many audio jacks do you have on your laptop? If there is one, it may be a combo jack with an integrated microphone and speaker. In that case, you may have to use a conversion adapter. There are several types of conversion adapters, so are you using the right one?
If that is difficult for you, you may want to use a USB audio conversion adapter.