i need help after i have installed nvidia driver 2 reset my screen resolution

hello sorry if iam posting this the wrong place. But i have downloadet and installed nvidia drivers and nvidia cuda toolkit, but after that my PC don’t recognizes my tv(that i use as my screen) and the resolution i set on 1024x768 and it is now marked as unknow’n and i can’t change the resolution in display under hardware. i have tryed to fing the conf. file but i just show some random numbers. can anybody help me to so i is not set on wide screen and help me with how i can change it to normal. and my install is home edition the new and updatet one.