Video card is crashing

[sdimejoker]

Okay, so I downloaded the Omega Drivers like I had seen other people do on here. I also set all the settings to medium instead of high. The crash continued to happen after that. I then changed all the graphics settings to low and it worked for a long while. I made it through the part where you have to find the ingredients in the wine cellar. Once I was back in the laboratory, it crashed again. I'm so freaking confused.