Since upgrading to Windows 10, occasionally when doing things like browsing, I'll hear a "notification sound" from the speakers followed by a click from the monitor as the screen goes dark and then comes back in a different resolution -- usually a low-res mode. A second or two later, the same sequence repeats and it comes back up in the default mode, but usually with my windows resized and moved around due to being in the low-res mode.
This is getting very annoying and disruptive. It usually happens while I'm browsing, but that might be because that's where I've been spending most of my time recently. I ran the driver detect utility and it tells me that I have the latest drivers.