Unexpected Error Upon Quit

[Ceallach]

After updating the graphics driver, she got a similar error. It was two windows in a row again. The first was the same, but the second read differently.

An unexpected error has occurred. Exiting FINAL FANTASY XIV. 2018-08-02_01:56

ffxiv_dx11.exe+2B1B5E
ffxiv_dx11.exe+95824
ffxiv_dx11.exe+5CC65
USER32.dll+16CC1
USER32.dll+1699C
USER32.dll+20453
ntdll.dll+9DBC4
win32u.dll+23C4

After that, I tried turning off DirectX 11 support. When logging in, the green Play button said "DirectX 9.0c" in small print at the bottom. Clicking the button, however, caused the game to fail to launch, citing this.

A fatal DirectX error has occurred.(1000003d)

Then I turned DirectX 11 support back on. I tried turning on compatibility mode for Windows 8 next. The first error still appears when closing the game. That was followed immediately by the first error I mention in this post before the game actually closed. I turned off compatibility mode at this point.

The game's already installed on the C drive, as that's the only drive this laptop has. At this point I opened the task manager. For startup programs, there were only ten things listed, some of them antivirus software. I disabled them all, shut down the laptop, and turned it back on (read: I didn't choose to "restart"). I opened the task manager again to double-check that the programs I disabled were still listed, and they were (and still disabled). The errors still came up when I quit the game. At this point, I enabled the startups again.

EDIT: I did some research and found out a few things that might be the cause. It's probably not the Game Bar on Windows 10, which I already had completely off. System scans showed no problems. Microsoft was essentially unable to help in any meaningful way. I did, however, find out that the game works just fine in windowed mode. I'd rather not be stuck with that, if possible.