Crash when transferring from launcher to game

Hey guys,

Not entirely sure what's going on here, but over the weekend, I had a Windows update push and a driver push from AMD. Never had any issues yesterday immediately after doing both updates, and again didn't have any today. Attempted to launch tonight (PC hadn't even restarted), and now running in to issues.

I downgraded the drivers, and the error now persists. Have restarted numerous times. Attempted to "reset settings" inside the FFXIV launcher, tried DX9 and DX11 (I usually use DX11).

Confirmed no malware or virus infections.

Can further confirm that other games work using both DirectX 9 and DirectX 11. I just played an hour long match on Battlefield 4, and ran around on World of Warcraft with no issues at all.

As for even weirder stuff, I found this suggested in a post back in 2014 when someone couldn't get their Steam version working. Basically, launch some OTHER game that uses DirectX (for me, I chose WoW), and then try to load the launcher and the click Play. FFXIV loads at this point in time, and works fine. I can safely close the other game, and everything works. Closing FFXIV and re-opening does not present the error. It appears there is something NOT being initialized correctly when the transfer happens from the launcher process to the game process.

Basic System Information:
Windows 10 Home x64
i5 3570k (stock clocks)
Radeon R7 360 (Driver 16.3.2 reverted from 16.5.2, which did technically work)

Event Viewer. First is the Error Entry:
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Faulting application name: ffxiv_dx11.exe, version: 1.0.0.0, time stamp: 0x570aa0e4
Faulting module name: ffxiv_dx11.exe, version: 1.0.0.0, time stamp: 0x570aa0e4
Exception code: 0xc0000409
Fault offset: 0x0000000000165617
Faulting process id: 0x1fc0
Faulting application start time: 0x01d1af32ec83f4bd
Faulting application path: D:\Games\SquareEnix\FINAL FANTASY XIV - A Realm Reborn\game\ffxiv_dx11.exe
Faulting module path: D:\Games\SquareEnix\FINAL FANTASY XIV - A Realm Reborn\game\ffxiv_dx11.exe
Report Id: b4bc5057-ddc9-4277-a3e9-a516bbbf5669
Faulting package full name:
Faulting package-relative application ID:
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Next is the related Information entry:
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Fault bucket 116149871642, type 5
Event Name: BEX64
Response: Not available
Cab Id: 0

Problem signature:
P1: ffxiv_dx11.exe
P2: 1.0.0.0
P3: 570aa0e4
P4: ffxiv_dx11.exe
P5: 1.0.0.0
P6: 570aa0e4
P7: 0000000000165617
P8: c0000409
P9: 0000000000000000
P10:

Attached files:
C:\Users\tehserver\AppData\Local\Temp\WERC1C6.tmp.WERInternalMetadata.xml

These files may be available here:
C:\ProgramData\Microsoft\Windows\WER\ReportArchive\AppCrash_ffxiv_dx11.exe_dd5a93eeb9d5cf2c5091dcb5197a8b4fb71f1_4bae1be1_16a4c6b7

Analysis symbol:
Rechecking for solution: 0
Report Id: b4bc5057-ddc9-4277-a3e9-a516bbbf5669
Report Status: 1
Hashed bucket: 0b8025ad92aa488aeacda8e5e5b705d7
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