If you receive a message like this after the latest update:
21:00:24: Starting BattlEye Service... 21:00:28: Launching game... 21:00:28: Windows Kernel modification detected. Please repair or reinstall your system. 21:00:28: Failed to launch game.
…it’s because you’re using a pirated version of Windows 7.
Personally, I think you shouldn’t be doing that. The best solution is to not pirate Windows 7 if you want to play any BattlEye game.
Posting this preemptively so less people make a fool of themselves on the forums.