jane1 :
Please how do I go about that...can u tell me step by step
Are you using Windows 7 or 8? And what is your laptop manufacturer and model number? You will need to download the most current driver from your manufacturer's website before proceeding.
They're both about the same but for Windows 7 to delete and reinstall your audio drivers do this:
1. Start.
2. Control panel.
3. Add / remove programs.
4. Select audio drivers (most are Realtek).
The program will then ask you to restart. Then install the new drivers and restart again.