Microsoft’s August 11 Windows update is causing problems for some PC gamers so If your games have stopped working after a recent Windows update then this is likely the reason why.
The update in question is KB5121003 which released on August 11, 2026. Microsoft received reports of issues involving inability to run games as expected following the release of Windows updates on August 11, 2026. The affected number of games which include ARC Raiders, MARVEL Token: Fighting Souls, and The Finals seem to be struggling the most with this recent update.
ARC Raiders and The Finals are both live-service shooters with active player bases. If you launched either game this week and hit an error you hadn’t seen before, you’re not alone and your hardware isn’t broken. Important note to keep [ in mind is that although these games have been reported officially, it does not mean that no other games are affected.
What’s actually happening
Microsoft hasn’t published a detailed technical explanation yet, and all we know is what’s been confirmed: the update conflicts with how a specific subset of games handle certain system calls. The issue appears to be limited rather than universal since most games are unaffected. But for the games that are broken, the breakage is consistent and reproducible.
What to do right now
Three options, in order of how invasive they are:
Option 1 — Uninstall the update. Go to Settings → Windows Update → Update history → Uninstall updates. Find KB5121003 and remove it. Your PC will restart and the affected games should work again. This is the fastest fix. how to check if your PC is bottlenecking your GPU
Option 2 — Wait for Microsoft’s patch. Microsoft has asked users experiencing the issue to use Feedback Hub to file a report. A fix is typically issued within days for a bug this visible. If you can live without the affected games for a short stretch, this costs you nothing. just keep in mind that these are not definitive time lines, they are simply what Microsoft tries to adhere to.
Option 3 — Don’t update yet. If you haven’t installed KB5121003 and don’t need it for security reasons, you can defer it. Go to Settings → Windows Update → Advanced options and pause updates temporarily. This is the best-case scenario when these things happen, the best thing you can do is turn off automatic updates in windows and only download and install the update a few days after its release if there have been no reports of issues with it. Windows 11 gaming optimisation guide
Is it worth panicking about?
No. Windows update conflicts with games happen a few times a year and they always get patched. Microsoft’s patch cycle is fast when the bug affects games with large active player bases, and The Finals alone has enough players to get this prioritised.
If your affected games are competitive titles where you rely on daily play — just uninstall the update for now. Come back to it in a week. Nothing you’re losing from KB5121003 is more important than keeping your games running, at least in our opinion.
Check if you’re affected
The simplest test: launch one of the named games. If it loads normally, you’re fine. If it throws an error, it didn’t throw a week ago, KB5121003 is almost certainly the cause.
More games may be added to the confirmed-affected list as the week continues. Keep an eye on the game’s official Discord or subreddit — these communities will have the most up-to-date list and any community workarounds before Microsoft publishes an official fix.