Guild Wars 2

So, always when i start Guild Wars 2. My screen starts flashing and then it turns off. It have not happenede before when i was playing GW2 (had some problems with textures though) But it does not happen with other games. And my pc specs are
Nvidia gt 545
Intel i5
8gb ram
2 tb HDD
Please help me, thanks.

• Try updating video drivers.
• See Part 1.1 here for more troubleshooting