I updated my NVIDIA graphics drivers from version 352.86 to the most recent drivers which is 358.50. I opened guild wars and it had a patch so it downloaded. When I chose one of my characters and logged in, the screen just kept flashing. Everytime I tried to input something nothing happened. If I alt+tab out of Guild wars then went back, the screen would update to what it would have looked like after the inputs, but the screen would still flash. I don’t know if the problem was on NVIDIA’s end or Guild Wars but I reinstalled the drivers for 352.86 and it solved the problem.