I have the exact same problem. WIndows 8.1 everything scaled just fine. 10 screwed something up big time. Using 100% DPI is not an option for me because on 25", 1440p looks really small.

So I upgraded from Windows 8.1 and had everything working perfectly, no blurry texts in any application. However, a lot of applications now have really blurry text, including some installed apps like...