FAULTY DISPLAY

My PC display is experiencing problems like corrupt images, faulty animations, sometimes I can see vertical lines on the screen. On the worst case, my PC frequently stops responding and more often the screen display starts blinking or blacking out. I tried reinstalling the display driver a few times already. I already got the latest version of the driver. I put the display configuration & the hardware acceleration bar to the lowest setting & still the problems persists. Only on the windows safe mode and when I disabled the video card on the device manager properties the problems stop occuring. I'm using a Nvidia Geforce2 MX400/400 video card which I had for almost 2 years now. What should I do?