[solved] windows 8 graphics problem

hello! since about 1 week my windows apps keep looking ugly and i don’t know why. i didn’t made any major changes to my system. can you tell me why and a solution for it?
for example:

Answer #1
Yeah its caused by NVidia and FXAA enabled globally they should really have a warning for that option.
Answer #2
oh, i suspected nvidia, sneaky, sneaky. thanks man, really appreciated!