Yap that is the point which riot never know. They know this problem since in PBE, riot don't want to fix it for TP that's fine, because it is not a official version. We know it, and no one will angry about it not working on preview version operation system. But the problem is: riot know that not work and DON'T BREAST ANY F*CKING WORDS. And after 15 hours from the patching, finally had riot said about something, however talked as if windows 10 players are none of their business. And saying like the bugs happened because of the recently core changes in Windows 10. BUT THERE ARE NO CHANGES OF WINDOWS 10 DURING 2 LOL PATCHES. In the same environment 2 patches work so different. If it is not riot has rewrite the whole lol program, i can't find second possibility.
The problem is not what has happened, the problem is how they face and solve these problems. A litter triangle on launcher noticing players "Windows 10 not working on patch 5.5" is really that hard for riot?
Yesterday after my complaining with riot, i finally got answers: "How about you don't play the game if you don't like the software policy? No one forces you."(these are exact what riot's worker said, i copied and pasted it)
DON'T PLAY THIS GAME, said RIOT.