Greetings Adventurer!

We would be happy to assist with your concern. For further assistance, please provide the following information.

Could you provide the exact error message received?
Are you running any addition programs alongside Final Fantasy XIV?
Does this crash occur on more than one character?
When the crash happens, is the PC over heating at all?
Were any update or changes made to the PC at the time of the crash?
Aside from the Extreme Trials, are you experiencing this issue in any other areas of the game?

Additionally, please also include all details involved with the problem for investigation on our end.

Thank you for visiting the FINAL FANTASY XIV Technical Support Forums!