Sometime when I close Oculus home my computer freezes with no reason and I have to restart it manuallyI use a DK2

after the last driver update DK2 clost positional tracking.Oculus home keep saying it can't find positional tracking sensor.

I have an old GPU( AMD 7850) but with my DK2, I can play Lucky's tale perfectly smooth. But inside Oculus home usually I have a lot of Judder. The strange thing is that sometimes it runs smooth.I can't understand why. Any Idea?I have windows 10, late...