Javelin anticheat "unacceptable configuration" 0xB3829EB7DE50BDB7

FC 26 on Steam won't start anymore. Javelin kills it before the game even loads and I get this:

"EA Javelin Anticheat has detected an unacceptable configuration. Please ensure no cheat-related or tampering software is active and restart the game. (0xB3829EB7DE50BDB7)"

I opened a ticket and EA Help basically told me there's nothing else they can do and to come post here, so here I am. Also curious if anyone else is getting this exact code.

Specs: Windows 11 (build 26200, 25H2, not on Insider), RX 7600 XT, Ryzen. Secure Boot is on, Defender is on with Tamper Protection enabled.

The annoying part is it worked fine for months, including earlier the same day it broke. I didn't install anything or change any hardware in between.

Every single attempt gives the same thing in Event Viewer:

• "Failed retrieving service path" from EA Javelin Anticheat
• about 45 seconds later, "ExitType: 0xB3829EB7DE50BDB7 (0x8655617090BA3024)"
• then EAAntiCheatService gets removed from the system

Stuff I've already tried, none of it made any difference:

• Uninstalled the game and the EA app, then manually deleted everything that was left over (C:\Program Files\EA\AC, C:\Program Files\Electronic Arts, C:\ProgramData\eaanticheat, AppData\Local\Electronic Arts) and removed both the EAAntiCheatService and EAAntiCheat service registrations. Then reinstalled from scratch.
• Reinstalled the anticheat on its own with EAAntiCheat.Installer.exe and ran Repair. It says ServiceInstall success, CertificateInstall success, Install success, and then the game still fails.
• Clean boot, and way too many reboots
• sfc /scannow, came back clean
• Checked Secure Boot is on, no test signing, no kernel debugging enabled
• Disabled every third party kernel driver I have, one by one and then all at once (Oculus ViGEmBus, AMD Ryzen Master V29/V31/V32, MSI Center NTIOLib_X64.sys and amigendrv64.sys). Right now literally zero non Microsoft kernel drivers are loading.
• Uninstalled Cold Turkey Blocker and NordVPN and cleaned out their leftover firewall rules
• Checked all the VC++ redistributables and runtime DLLs are there
• Updated GPU and chipset drivers
• Verified game files through Steam

A few things that make me think this isn't something on my end:

1. After the clean reinstall, the error now happens before EAAntiCheatService even gets registered, so it's failing the environment check, not the service setup.
2. The EAAntiCheat kernel driver actually loads fine every time (FilterManager Event ID 6) and unloads cleanly, so the driver itself works.
3. EAAntiCheat.GameServiceLauncher.exe and EAAntiCheat.GameService.exe are both version 1.0.15166423.0, so no version mismatch.
4. There's no crash dump at all, because it's getting rejected rather than crashing.

If anyone is seeing 0xB3829EB7DE50BDB7 specifically, please reply. Trying to figure out if this is a wider Javelin thing or just my account or hardware ID getting flagged.

I've got DxDiag, an export of 85 Javelin error events, the system log for EAAntiCheat and EA's own launcher logs if anyone needs them.