DPC, Cubase, Windows

I’ve made a Steinberg account just to say this:

THANK YOU SO MUCH.

I have been struggling with this exact issue for days now and I was so close to giving up on it. 600-1000us spike pretty much every 15min.
I tried creating traces with WPR but I could not isolate the problem.

Disabling “Diagnostic Policy Service” fixed it.
Again: Thank you.

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