I updated Win 10 a couple of days ago (June 16) and the line out for head phones and speakers (front and back) no longer works. Microsoft went onto the computer and said it is probably a hardware problem and win 10 shouldn't be used on Z400s anymore. I have reinstalled the graphic driver with audio driver (Nvidia) but not change. The internal speaker works on the computer but the line out 3.5mm jacks no longer give audio for external speakers or headphones front or back. Should I revert to Win 7? I'm running Adobe CC suite.