Good afternoon and thank you for posting on the Final Fantasy XIV Technical Support Forums.

As a part of our countermeasures against cheating, we’ve made it so that the error appears and the game will be unable to run when there are applications or processes, etc. that interfere with memory. There are a variety of applications in Windows, and it is difficult to suggest a specific method of solving the issue because everyone’s personal environment differs greatly, so please try running the game in a simple environment that you’ve confirmed has no applications or processes that interfere with memory.

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