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The other day I decided to rebuild the software on my PC. starting with Windows XP, I did a fresh install, and proceeded to install all of the drivers until there were no "Unknown Devices" in the device manager.

Then I installed Service Pack 3, and all of a sudden, I have 4 unknown instances of:

"Audio Device on High Definition Audio Bus"

Why would these only show up after an install of Service Pack 3?

...this seems very odd!

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  • Was Service Pack 3 the only update?
    – Dave M
    Feb 25, 2013 at 20:53
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    They would show up if the drivers were removed because the update was installed. Just install the drivers for this device.
    – Ramhound
    Feb 25, 2013 at 20:58
  • @Ramhound, I don't know what the device is. My O/B sound card is disabled. I have an Alesis IO|26 FireWire production card and an X-Fi Titanium, but all drivers for those are present and correct! - Could it be to do with HDMI sound via my graphics card, maybe? Feb 25, 2013 at 23:13
  • @series0ne - I don't know what hardware you have on your system. If everything is working, then a couple unknown devices, isn't really a problem.
    – Ramhound
    Feb 26, 2013 at 12:22
  • @Ramhound, Ah you would think so! But ever since installing SP3, I'm getting BSOD's with ever other boot. The machine really isn't suited to XP but I need it for some legacy applications. I might consider moving to Windows 7 32-bit though. Feb 26, 2013 at 12:44

1 Answer 1

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Look up the Hardware ids on the internet for the devices to see what they are. One good place is the PCI Database.com or just Google the strings.

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