So many people have the same issue in past week from what I see... I have the same problem, tried EVERYTHING. I thought it was some W10 update that coused it, but just a day before the issue I redownloaded amd drivers for my rx 480 too, so maybe that has something to do... And I'm sure that it has also something to do with "Scan Valid Interval" setting in wifi adapter settings since when I set it to 20 ping spike happens every 20 seconds, and when I set it up to 120, ping spikes happens every 2 minutes. I hope somebody who knows what is going on will answer, I will follow this thread.
Also, sorry for my bad english.