Windows10 loses all audio

Hi fellow Presonus owners.

I recently got a Presonus Studio 68 USB

Mostly all is working finem ruing Win10 with 64bit Reaper.

However often i will lose all sound in windows. The hardware is still coected as far as Windows is conceed. But the sound is muted.

Only way to resolve is to power off/on the Studio 68. or reboot system. It can happen when changing between programs, but also on other occasions with normal computer use in browsers etc.

Any ideas are welcome for a fix.

Br

Tommy