Micro-freezes in StarCraft II

I have a very strange issue on my SC II, namely as the title states, micro-freezes.
They tend to appear in regular intervals, more or less 5-6s and they last literally split second, barely noticible, but it is annoying as hell in a long run. I have them all the time, menu screen, cutscenes, music, multi-player matches, somehow only campaing plays are free from it.
I have latest drivers, PC gear do not even sweat on ultra settings, maybe windows 10 is somehow responsible for this, I have no idea…
Anyone had something like this, I tried all I could ?