Yellow Exclamation Point on SMBus Controller in Device Manager
Dec. 5, 2011 - Jim Bernstein
Almost every computer user will experience a hardware issue at some point. Some are easy to fix and some will take some work to diagnose. The Windows Device Manager is a good tool to use to diagnose faulty hardware since it will give some sort of indication of a hardware problem most of the time. The faulty device usually is flagged with a yellow exclamaion point or yellow question mark and so on.
Sometimes the device that is having the issue will be obvious when you look at its name such as network adapter or display adapter and sometimes you won't know what the device with the issue is by looking at its name.
The SMBus controller is the System Management Bus controller and is part of the Intel chipset on the motherboard. You may notice that you have a yellow exclamation point on your SMBus Controller in Device Manager. That's most likely because you need to install the Intel INF update utility to update the motherboard Intel chipset drivers.
Click here to go to the Intel page to download the latest Intel Chipset Software Installation Utility. You should also have the required software on your motherboard CD if you have it.
Be sure to create a manual System Restore Point before installing this software just in case something goes wrong.
Using Device Manager to Troubleshoot