Hello,

We're sorry to hear about this desktop crash issue you're receiving, Newhaap. If this is still occurring, we suggest contacting our support center at the following link:
http://support.na.square-enix.com/ > FINAL FANTASY XIV > Contact > Get Support.
Support Center is open Monday through Friday between 9:00am to 6:00pm PST.

They can provide some suggestions that can help prevent this crashing issue from occurring.
We will be moving this over to the technical support section for additional suggestions from our Community as well.
If you are still experiencing this problem after these suggestions, you are welcome to post another thread in the "In-Game Bugs" section detailing your results and we will be able to provide some additional support.

Thank you,
SQUARE ENIX Moderator