I've moved this into its own thread as it's not the same issue at all. (One symptom in common, but not the same root cause.)
Please post a screenshot of the "Received message 033920 = 0x08480" message.
That sounds like something coming from another component, rather than Opus. The screenshot might help identify it.
Please also check here in case they provide solutions:
You can also send process snapshots to us which can sometimes be used to detect where high CPU usage is coming from (whether it's Opus itself, or something else):
For the last one, please follow the instructions carefully, as almost nobody does. 