Javelin anticheat error (7) (2)

I came back from work and it turns out the Javelin has gone rogue, even though NOTHING has been changed in the system since yesterday.

Did I play the game on the latest update?
Absolutely, without any problems. And now this...

Literally nothing has been changed in the system, game, or launcher since the last time I played.

Secure Boot and related features are enabled.
Antivirus is disabled.
Reinstalled the game (Steam), Javelin as well.

I've spent several hours poring over advices on how to fix this problem (EA Forums, Steam, Reddit, etc.), and nothing works. It's a miracle I didn't brick my PC.