before you reinstall windows go here and download the audio driver
Download
1. Click Download File.
2. When the File Download window is displayed, click Save to save the file to your hard drive.
Installation
1. Browse to the location where you downloaded the file and double-click the new file.
2. Read the information in the dialog window.
3. Download and install any prerequisites that are identified in the dialog window before proceeding.
4. Click the Install button.
5. Follow the remaining prompts to perform the update.
Download
1. Click Download File.
2. When the File Download window is displayed, click Save to save the file to your hard drive.
Installation
1. Browse to the location where you downloaded the file and double-click the new file.
2. Read the information in the dialog window.
3. Download and install any prerequisites that are identified in the dialog window before proceeding.
4. Click the Install button.
5. Follow the remaining prompts to perform the update.