This is actually a fairly common issue that players have been experiencing due to certain configurations in the Nvidia Control Panel. We suggest adjusting your Anti-Aliasing settings in the Nvidia Control Panel. Please try the steps below to make these changes:
1. Right click on the desktop.
2. Select NVIDIA control panel.
3. Select Manage 3D Settings.
4. Verify the “Antialiasing – Mode” is set to Application-controlled / or click Restore.
5. Click OK.
Once completed, please try launching Guild Wars 2 again.