Why my w8 start screen gone all fuzzy (out of focus)...?

[chaparral]

Anyone have any ideas why my w8 start screen started going all fuzzy tonight (out of focus)...
Each icon now only goes sharp when you put the mouse over it

 

[chaparral]

Fixed it,i think

By reinstalling the GPU driver..

 

[yashiro]

You had probably enabled FXAA (or another driver setting) as a global option.