So recently, I picked up a Precision T5400 with dual Xeon 5405s, and upgraded it to Windows 10 Education because I got a free code from a friend. I also maxed the RAM out to 32 gigabytes.

The machine runs fine except for one issue. I don't have any sound on it, with Windows 10 telling me "No output devices found" and "no audio devices are installed" when I plug in a perfectly functional set of Harman Kardon speakers that work well with my brothers machine.

Did anybody else have these issues with sound drivers upgrading to Windows 10, or is this happening because the onboard sound is dead?