Now you should have the ability to adjust the levels on both. Note: Vista sometimes, by default, sees some 'Video Player' as the playback device and the line input as a microphone, make sure you have selected the correct Playback and Recording Device. Come back here and choose the 'Recording' tab. When you see your speakers, select them and click the 'Set as Default' button. Once that is up, Right click in the window and select 'Show all Devices' repeat, this time selecting 'Show disabled Devices'.
Now, once that issue is taken care of, you can go back to the 'Sound' tab in the Windows Control Panel. It will ask you if it can search the internet select 'Yes'. Audio driver is the software that helps your operating system to communicate with audio devices such as internal sound cards, speakers, headsets, and microphones. Click 'Device Manager', select 'Sound' device, right-click and select the 'Driver' tab. This package contains the Realtek High Definition audio driver. If that is not available, then Right-clicking the 'Computer' icon and selecting 'Properties'. If you don't have that icon, you should be able to go to your Computer/Motherboard maker and retrieve them don't go to the Realtek website. I ran microsofts troubleshooter and it managed to enable my monitors audio but my Realtek High Definition Audio is now missing which is what I use to plug my headphones in and microphone.
