"every few seconds" is a prime indicator of "Automatic Network Discovery" being enabled for Wi-Fi. Not sure if is in the same spot on Win10, but there are posts here about that.

I don't have Wi-Fi on my computer, the network cable is connected directly to the motherboard.

Anderton
I should clarify that the blue screens did not happen when using SONAR, which so far has been running fine on my laptop after the update. Haven't updated my desktop yet.

So do the blue screens give you a hint? 

Updated before backing up...big mistake! Turns out the process somehow erased one of my drives which had some recent projects stored. Had backed it up a couple of weeks ago though...never learn but WTF? Everything else was fine - except re-authorizing AD2 again. 

Any ideas why it would wipe a drive?

Yesterday I updated BIOS, motherboard chipset drivers, network card drivers, graphics card drivers and it seems to be a lot better now. There are ocassional glitches from time to time but it's way better than it was before.
[EDIT] It looks like finally audio glitches are gone after next reboot. They appeared mainly because of the outdates motherboard and network card drivers. Now the playback's very smooth again!