Good morning! Thank you for posting in the Final Fantasy XIV Technical Support Forums.

We apologize for any inconvenience experienced when trying to play Final Fantasy XIV. Can you please type out the error/number code (Ex: 16a) you may be seeing when launching the game?

Have you attempted to delete the patch folder from the device?
(My Documents > My Games > FINAL FANTASY XIV > Downloads > Delete patch folder)

Additionally, please try disabling background applications and do a clean boot by opening the task manager and selecting the “Start up” tab. Disable everything and then restart the PC.

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