My PC shuts off and restarts after about 10 minutes of Fortnite, then gets stuck in an automatic repair loop. It only happens with this game. Reinstalling it didn't help, FurMark didn't trigger a crash, and a storage health check looked fine.
Event Viewer showed a SecurityCenter SecurityAppBroker permission warning, but I didn't find anything else obvious around the restart. What should I check next?
Check temperatures while Fortnite is actually running, including the CPU as well as the GPU. FurMark is useful, but it doesn't reproduce every workload a game puts on the system.
If your monitoring tool can log readings to a file, start logging before launching the game and check the last readings after the restart. That may give you a clue even if the machine shuts down too quickly to see what happened.
That permission warning is probably a distraction. I wouldn't change COM permissions based on that event alone. Check the System and Application logs again around the exact time of the restart, including the entries just before it, and look for hardware errors or a bugcheck.
A sudden shutdown may leave no useful error before the restart, though. An unexpected shutdown entry tells you Windows didn't shut down cleanly, not necessarily why.
The automatic repair loop needs attention too. If you can get back into Windows, back up any important files before doing more crash testing. A healthy storage status is reassuring, but it doesn't rule out Windows file or filesystem damage after abrupt shutdowns.
If repair keeps looping, note any error message it gives you and troubleshoot that separately from the Fortnite crash. Avoid resetting or reinstalling Windows until your files are safe.
Try changing one game setting at a time, such as lowering the frame rate limit or switching the rendering mode. It's a way to narrow down what triggers it, not proof that the game itself is the faulty part. Also check whether your graphics driver is current.
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