I do realize it's just the preview but I thought it was weird that it said it was drawing too much power when it didn't do that with Windows 7. The power consumption is the same. It sucks because the D7 sounds so much better than the E7. Hopefully I can find a solution or it looks like it's time for a new DAC. Windows 8 looks too nice to go back to Windows 7.
It says the same thing on Mac and it still function as per normal. All the Mac users get this warning.