Hi down8, long time.
Have you tried updating to the latest INF, maybe those will take care of the Unknown Device. Did it only appear when you switched to the new proc? Odd.
In HW monitor, maybe you have the processor too cool since you're on water. Maybe the temp measuring range doesn't reach that low and it shows 0degC when out of range. I believe I have the spec sheet for the HW monitor chip, I'll check. No, temps are within 0..127degC, guess you don't have below 0 temps.

BT, are you sure the problem is not with your mic? It could be the drivers yes but did you try another mic or didn't it happen on Vista?
Intel's answer is always the same, it will take long I guess. Between IDT releasing them and then Intel testing internally and releasing to the public, well...