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Solving “Unknown Device” Errors when Upgrading Windows
Posted November 26, 2006 – 10:11 pm by Yakov Shafranovich in TechnologyThe following was something I learned from a recent computer upgrade I did for someone else (from Windows ME to Windows 2000) – after installing Windows 2000 fresh, and getting all the drivers, there was still one unknown device left in Device Manager. Apparently it is a common problem with Intel’s SMBus driver.
Here are the steps I took to solve the problem:
1. Followed instructions in this Microsoft KB article on looking up the PCI vendor and device information (8086 and 2443).
2. Looking up the vendor ID and device ID in www.pcidatabase.com (it turned out to be SMBus device made by Intel).
3. Got the chipset ID utility from Intel to identify the chipset (turned out to be 815EM).
4. Went to the Intel Chipset Install Utility download page.
5. I had to go through the release notes on every version posted until I found the version I wanted and the chipset I wanted.
6. Download, install and enjoy!
P.S. The driver name in the end is “82801BA/BAM SMBus Controller – 2443″ for Windows 2000, something that the “nice” people from this site want to charge $4.95 for while it is available for free from Intel.
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