Audio in Colour

Hi.
I am running 15.0
When grading I am losing audio. It doesnt happen all the time. It might be because I am bumping something or hitting a shortcut inadvertantly. It seems to take a reboot to get it back.

W10 latest
Quadro K5200
32g ram

I have an audio issue with 15.0 as well. I have asked the question already on the forum. When I import a file to edit the sound track is not audible when played. If the project is rendered the audio is rendered with the video. Makes it impossible to edit without the audio.