Fonte: link
Windows 10 is using another scaling method for DPI as in Windows Vista, 7, 8 and 8.1. At some point we can understand Windows why they changed the DPI scaling in Windows 10. It is probably ment to support mobile devices more easy.
The SIMPLE fix: Right-click on the shortcut to your application that has blurry fonts, then select 'Properties'. Then tab 'Compatibility'. Then enable 'Disable display scaling on high DPI settings' and hit 'Apply'. then restart your application, and you see it will look good.
O mesmo endereço apresenta um pequeno programa que, teoricamente, corrige o problema no nível do sistema. Eu não tentei embora. A correção por programa funciona para mim.