The Task Manager clip is pretty useless. It only shows that there are spikes. You may want to show the "Processes" tab results - when the spikes occur and with the CPU column prioritized.
The Process Explorer clip was taken at the wrong time. No spike there. The DPC's are deferred interrupts. But the magnitude of those are pretty normal. You could check your Latency with this tool
. If you have a lot of red bars, then you have some driver
problem. If that is the case, we'll investigate that later.
I also suggest you run the Process Explorer in a small window (to have it always ready) and try to catch the spikes.