Directx Error BF4

OK i think i have a solution, you need to be able to get into game, don't deploy.
Hit escape and go to video settings, change to windowed and apply.
Change other settings to low and apply.
set back to fullscreen and apply.
This is just a Maybe, But try doing stuff in windowed mode UNDEPLOYED (In game menu not in game itself)

** TEMPORARY SOLUTION: **

The game has a settings file leak, where it gets slower and slower every time you make a change to any jet keybindings in settings.

To reset it delete the PROFSAVE_profile file in your My Documents/Battleifeld 4/settings directory and start over.

You'll have to rebind all keys again, which also count towards your max # of settings changes.

This is an issue with both jet and helicopter bindings

THIS IS A MAJOR BUG WHICH EA HAS YET TO ACKNOWLEDGE

For those who are PC savvy, here is a regex to find/remove all of the invalid entries in the PROFSAVE_profile file

^GstKeyBinding\.[a-z]+\.Concept.*\.(([4-9][0-9]*)|([0-9][0-9]+))\.[a-z]+ [0-9]+$

My PROFSAVE_profile file had over 327,000 invalid entries in it

So, if you know how to do regex search/replaces, you can bind as many keys as you can until the game crashes, then do a search/remove using the string above, then continue binding your remaining controls. If it locks up again, rinse and repeat until your bindings are all set. I only had to do it once, but YMMV.