SM Bus Controller Stand for System Management Bus which integrated with your computer chipset. You SM Bus Controller driver is missing if device manager displays SM Bus controller under other devices with Yellow Sign. SM Bus Controller in Windows XP SM Bus Controller in Windows 7 You can fix it by installing the latest chipset drivers for your computer. This problem is common among computers with Intel and AMD chipset. 1. First download the latest chipset drivers. Intel Chipset / SM Bus Controller Driver: Intel chipset Installation Utility AMD Chipset : AMD SM Bus Driver 2. Install the drivers and wait until the installation finish. 3. Restart your computer after installation finish. Your laptop or motherboard manufacturer also provide the chipset drivers on their support site. However installing the drivers from Intel or AMD is recommended since they always provide the latest drivers available. Where to Download AMD Chipset? For Intel you does not have to choose the chipset...