How Do I get My Video Driver Back?

[BabyAngie_EX]

Errr...Do I really have to tell all this? Okay like this. Everything works perfectly before this thing happen. Well...Not really perfect. Some area/place/things/mob in game like house, face, armor become white. white the interface is still ok. So I'm thinking what should I do. I looked at the Fiesta website download section. Looking at the graphic things. So I click this one http://www.nvidia.com/Download/index.aspx?lang=en-us I install one of the graphic thing. and i installed it. and POOF everything become black and white. I restared my pc. and uninstall that thing. And everything back to normal. Except something. some pop up appear about found new hardware. I tried to install but they said I need to put in the installation disc. I got no disc, so i click cancel. I open fiesta launcher and I tried to log in. Some pop up appear it says something like can't find video driver. please install the video driver for your graphic card. and i like w.t.f?! What should i do next?