unity3d editorui glitch with blured font and colored rectangles.

hi, i have unity editor ui glitch all the time : some colored rects appears when i use the editor. Computer : MSI ge62 optimus gtx 960m width last drivers. windows 8.1 64bits. Same thing with last unity stable, or the unity beta 5.3.4f1 that is shown on the screenshot. Same thing with differents power schemes (energy saver and powerfull), and settings in nvidia panel config with nvidia prefered or not (i suspected the intel HD to be used and cause those glitchs but it seems not) the font is blur too at some time.

Any idea ? Thanks.