A month or so ago I thought I'd re-enable the Insider update, (had it enabled a year or two ago), and almost immediately ran into the same problem I had previously on different hardware and after having reinstalled Win 10 a couple of times.
Micro-freezes, every few seconds the system, (or maybe just the mouse/keyboard input), would freeze for less than a second.
Oddly enough during regular use I hadn't really noticed it, as soon as I started playing a FPS game it became blindingly obvious.
Tried different things, eg. completely disable firewall just in case it's MS trying to phone home, unplug non-essential peripherals, kill any of my usual background programs, etc, etc - couldn't work it out.
In the end I just reverted to the release stream and the problem disappeared.
Second time it's happened, basically a completely new computer and still no idea what caused it.
Anyone had anything similar?