I had the same problem as described by others in this thread and I FIXED it! At first my game would lock up and crash whenever I alt tabbed. Then it started to crash even when I was just playing and didn't alt tab. Then my computer started shutting off and not turning on for a few minutes after. My problem kept getting worse and worse as time went on. I ran many hardware checks on my computer and found all the components seemed to be working fine.

However, when I looked up my power supply unit model number the Thermaltake TR2 600NL2NC, I found that it was a defective model and was known to cause problems like I was having. Anyway, I went and bought a Corsair psu and installed it. I have not disconnected/crashed/or had my computer shutdown while playing FFXIV.

The morale of the story guys: Check your hardware. It seems to be a very select part of the population having these types of problems and if it was a program problem a lot more people would be having the same issues. I also noticed that my friend who had the exact same rig as me minus the power supply didn't have any of my issues.


I hope this helps, Cheers!