I have tried Win10, but all these new UWP based parts tacked on Win7 shell are so laggy. I mean click on start button, it takes several noticeable milliseconds to show up, the same for the windows clock pop up (calendar), etc. even the calc has now a loading screen and animation. And even though these UWP parts like the start menu are coded in C++ for the UWP API, they are like 100 times slower than the old C++ WinAPI based applications. I know, I had a discussion with the MSFT startmenu devs over here on HN in a thread several months ago - it's a lot less responsive than what could be done with a WebView control and HTML and CSS yet it's even solver than both a webview and a native C++ WinAPI implementation - sucks. I stay with Win7, which is superb and doesn't suck.