Update for crash and dropout

Hello, I recently suffered multiple instability and stall with my DAW (platinum sonar)

This is produce a time updates made.
I updated my lynx AES16e card and my graphics card.

When reading a project (with various plugin, reverb, automation etc ...) sonar dropout, I find it impossible to réactivat
the audio engine, I have to close and then I re-opens sonar for this re-working (a moment courtyard)

Sonar crash sometimes without reason.

The lynx mixer change my outputs, each start the mutated or activated outputs no longer match
(Exit 1 no longer read 1 but reading 6 eg, volumes are no longer 0 etc ...)



So I initially reinstalled former pilot of the graphics card, but it changes nothing.
I changed the latency (the new lynx update allows me to go up to 8000ms) even where it dropout.
I disabled the c unit and speedstep, it changes nothing
I deactivated the HDMI audio output of my graphics card, it changes nothing.

I totally off my graphics card, and it works (except if it was just a fluke)
My graphics card is an AMD HD6700

I'm lost, my computer always had the same configuration and always worked,
even with much larger projects I have never had a single dropout.

I do not know if the problem necessarily just Sonar but may be you can help me, I made two updates and I am unable to work ...

I work in windows7


Thank you