Graphic problem

hello,i am new here
i know that the title is a little bit generalized but thats because i can't recorgnize the source of my problem, my screen appears to have a low resolution and when i try to change it is impossible , the colors are very strange...the description can be in the snapshot i'll post below... the incident happened when my screen turned black suddenly and the BOsD appeared to inform me that its a problem with nvlddmkm.sys . i have NVidea Geforce 9400 GT for a graphic card.
ps: when i open the device manager the pilote seems to be "stopped because it presents problems (code 43)"
Thank you Kioskea, good bye