How?
So the first thing you need to do is open the Osu! folder=right click your osu! shortcut and press "Open file location"
then go to the osu!<username>.cfg and open it with the editor.
then search "Shaders" and delete the 1 and type 0
the same with "BloomSoftening"
Then save the cfg. data and open Osu
now it should work
don`t activate in the osu settings the shaders/Bloom softening or this happens again. 
So the first thing you need to do is open the Osu! folder=right click your osu! shortcut and press "Open file location"
then go to the osu!<username>.cfg and open it with the editor.
then search "Shaders" and delete the 1 and type 0
the same with "BloomSoftening"
Then save the cfg. data and open Osu
now it should work
don`t activate in the osu settings the shaders/Bloom softening or this happens again.