Guild Wars 2

It’s my first time posting here, but I’m hoping someone might have insight…

I have had virtually no issues playing the game on the same machine for the past year and a half. When playing the Hidden Arcana storyline, after I touch the hourglass and enter the next zone, I experience a black screen almost immediately but can sometimes make it to the first boss before it happens. I tried playing in windowed view and that didn’t help either. The only thing that seems to make a difference is adjusting the resolution to 640×480, but it was almost impossible to see what I was supposed to do in the boss fights and I ended up maximizing the window and immediately black screened again. The black screen requires me to restart the whole machine, even in windowed mode. I have all my in game graphics settings on low or none. I can play for hours in every other zone without issues. Is there anything else to try?