SigmaTel Codec Windows NT: If your OS is Windows NT and you decide to install the SigmaTel Codec Codec drivers, the procedures are listed as follows. 1. Go to Start button, select Setting item. 2. Choose Control Panel item, select Multimedia icon. 3. Choose Device item. 4. Select Add button. It will show a window ("unlist or updated driver") 5. Press OK button, It will show a window. 6. Type in the appropriate directory path where the SigmaTel Codec Codec driver exists \AUDIO\Intel810\SigmaTel\WinNT. 7. Press OK button and follow prompts. It will then start to install the driver. 8. Reboot your computer.