Name: SigmaTel Mars II MII 898 Driver
Author: SigmaTel

Question 1

Install fails or Code 10/28 appears?

Accepted Answer

Old SigmaTel audio packages often need admin rights and Windows compatibility mode. Run the installer as administrator, reboot, then check Device Manager for a yellow warning icon.

Question 2

Device not detected / no sound?

Accepted Answer

Confirm onboard audio is enabled in BIOS, install the chipset driver first, then rescan hardware in Device Manager. On laptops, also check Fn mute keys and Windows sound output device.

Question 3

Version conflict with Microsoft HD Audio?

Accepted Answer

Windows Update may replace the SigmaTel driver with a generic High Definition Audio device. In Device Manager, choose Update Driver > Browse > Let me pick > Have Disk and point to the SigmaTel INF, then reboot.