This is an odd issue, and I've found it nearly impossible to try and search for solutions because all you ever get is pages about how to use the snap feature, or disabling stuff that doesn't fix it. I've just come from Win 7 where it didn't happen. I use the win-arrow keys to keep two windows in half of my screen. The two problems I've had are that if I've gone to a full screen windows (such as watching youtube or other streaming video) when I come back from full screen, the window has gone from being snapped in half the screen, to just overlapping the other one. The other is that it would also overflow to my second screen (I have a widescreen, and then a 22" upright for various things), and be annoying. I've "solved" the second problem by moving my 2nd screen taskbar to the left side of the screen so it no longer overlaps, but I still get the snap issue. Is there a way to solve one or both of these issues?