Is Battlefield 6 Crashing After 20 Seconds? Windows 11’s Optional KB5124010 Update Is the Likely Culprit

Your Battlefield 6 session probably isn’t dying because of your RAM overclock (Ed: You’re still playing this?). If the game drops to desktop about 20 seconds in with no error, and you recently installed Windows 11’s September preview update, the update is the first thing to check.

Microsoft shipped KB5124010 on September 22 as an optional non-security preview for Windows 11 24H2 and 25H2 (builds 26100.9550 and 26200.9550). Microsoft notes it is the final preview update for 24H2. Its known-issues list covers Credential Guard domain trust problems and USB Audio Class 1.0 devices, and says nothing about games.

The game developers are the ones confirming it. Team17 posted a support notice on the Wardogs Steam forums tying the game’s WD-L020 launch error to KB5124010. It walks players through uninstalling the update, calls removal optional and at your own risk, and says the team is still investigating a fix.

Battlefield 6 players have been reporting the same pattern since the update’s preview builds went out. One Steam thread from September 11 describes crashes to desktop after 20 to 30 seconds, reproduced on three Windows 11 PCs, with Windows 10 unaffected. Another thread says Javelin anti-cheat troubleshooting did nothing, while uninstalling KB5124010 fixed it immediately. Both Battlefield 6 and Wardogs rely on kernel-level anti-cheat, which is the obvious suspect, but nobody has confirmed the mechanism yet.

How to check if you’re affected:

1. Open Settings > Windows Update > Update history and look for “2026-09 Preview Update (KB5124010).”
2. If it’s there and your games are crashing, go to Uninstall updates, remove KB5124010 and restart.
3. Because it’s an optional update, you can pause updates or simply not click “Download and install” until the October Patch Tuesday build lands.
4. …
5. Profit

Players in the Battlefield threads report that PCs enrolled in the Windows Insider program may keep reinstalling the update until they unenroll.

This is the second month running that a Windows update has broken games. In August, Microsoft finally started looking into the Patch Tuesday update that kept killing games, then blamed RGB lighting software.

Optional preview updates are Microsoft’s beta channel wearing a production badge. If you game on the machine, leave “get the latest updates as soon as they’re available” switched off. Fixes baked into KB5124010 will arrive in October’s cumulative update anyway, hopefully without the crash to desktop.

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