I upgraded my W7 to W10 today using this link, well it's finnish language version link actually: https://www.microsoft.com/en-us/accessibility/windows10upgrade I am not sure any if assistive technologies really need be used, but I played a bit with a magnifying glass before install. More about this loophole in this link: http://news.softpedia.com/news/wind...grade-using-assistive-tech-trick-512918.shtml I did install the W10 thing with AG in off mode. All seemed work well and I had uninstalled TinyWall. Now to my question: It seemed Microsoft Edge browser had owned the right to open pdf files by default. So the first try i noticed that Edge started and then the window vanished. The Edge would not start even as a normal browser start, so I suspected AppGuard. MS Edge seems work when I unticked the guarding of it in Guarded list. If anyone has better solutions if any to make it work, I'm open for suggestions.