Microsoft shares temporary fix for Windows 11 gaming issues
Microsoft has published a registry-based workaround for Windows 11 gaming crashes and reboots triggered by August 2026 Patch Tuesday updates, blaming third-party RGB lighting drivers.
Intelligence analysis by Llama
Microsoft confirms that the inpoutx64.sys driver shipped with RGB peripherals is causing game crashes, reboots, and EXCEPTION_ACCESS_VIOLATION errors on Windows 11 24H2 and 25H2 systems after the August 2026 Patch Tuesday, and has published a registry workaround until a proper fix ships.
Some Windows 11 computers started crashing when people played certain games, and Microsoft figured out it was because of a little program called inpoutx64 that lives inside colourful RGB lights. Until they fix it for real, the only way to make games work again is to tell Windows not to load that little program anymore, using a special settings menu called the Registry.
Analysis
inpoutx64.sys
The culprit behind the latest round of Windows 11 gaming pain is a single file: inpoutx64.sys. Microsoft says this driver is shipped by peripherals and internal components that have RGB lighting features, and that on affected systems its presence is what triggers the crashes, freezes, and unexpected restarts when certain games are launched. Embark Studios, the Swedish developer behind The Finals and ARC Raiders, independently confirmed Microsoft's diagnosis and added that the root cause is changes Microsoft made to the Windows kernel driver that interacts with inpoutx64. The technical shape of the problem is significant: a third-party driver with kernel-level access is being relied upon by games for input handling, and a kernel-side change in an August update is enough to break that contract and take the whole system down. Microsoft's official mitigation, until a permanent fix is released, is to flip the Start value under HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\inpoutx64 to 4, effectively neutering the driver on boot and asking users to restart.
KB5121003
The breakage was introduced by the cumulative updates rolled out on August 11, 2026, with KB5121003 acting as the trigger. Microsoft says the issues affect Windows 11 24H2 and 25H2, and the failure modes extend well beyond a simple game crash: players have reported games that will not launch at all, mid-game freezes, EXCEPTION_ACCESS_VIOLATION errors thrown by the games themselves, and full system reboots. The blast radius stretches across multiple high-profile titles, including ARC Raiders, MARVEL Tōkon: Fighting Souls, and The Finals, which makes the problem more than a single-game regression. Microsoft has separately warned that disabling inpoutx64 is not free: it can degrade or outright break the RGB lighting software that ships with affected peripherals, leaving users to choose between working games and working lights. The company is also still asking affected users to file Feedback Hub reports so it can map the full set of RGB components and games involved.
Embark Studios
Embark Studios' confirmation carried weight because two of the three named games, The Finals and ARC Raiders, are its titles, and its engineers are the ones watching the crashes land in their telemetry. By publicly backing Microsoft's driver-based explanation and adding the kernel-driver nuance, the studio helped narrow the troubleshooting surface for thousands of players who might otherwise have blamed the games themselves. The episode is also a small reminder that gaming on Windows 11 24H2 has been a recurring source of compatibility pain this year: Microsoft has previously had to remove upgrade blocks for Asphalt 8: Airborne, Star Wars Outlaws, Assassin's Creed, and Avatar: Frontiers of Pandora, and most recently lifted an Auto HDR compatibility hold that was breaking some games on 24H2. The pattern suggests Microsoft is shipping kernel and graphics-stack changes faster than its compatibility telemetry can keep up, and that peripheral vendors shipping unsigned or loosely vetted drivers into the same address space are a persistent weak point.
Key points
- Microsoft blames the Windows 11 gaming crashes and reboots on the inpoutx64.sys driver shipped with RGB peripherals and internal components.
- The issue was triggered by the August 11, 2026 Patch Tuesday updates (KB5121003) on Windows 11 24H2 and 25H2 systems.
- Affected games include ARC Raiders, MARVEL Tōkon: Fighting Souls, and The Finals, with reports of crashes, freezes, EXCEPTION_ACCESS_VIOLATION errors, and unexpected restarts.
- The official workaround is a registry edit that sets the `Start` value for inpoutx64 to 4, at the cost of breaking RGB lighting features on some devices.
- Embark Studios confirmed Microsoft's diagnosis and added that the underlying cause is a change in the Windows kernel driver interacting with inpoutx64.
Microsoft has already isolated the offending driver and is collecting telemetry from Feedback Hub, which should let it ship a targeted fix in a future cumulative update without rolling back August's broader changes. Once a proper patch lands, users can simply re-enable the `Start` value for inpoutx64 and recover full RGB functionality.
Disabling inpoutx64 silently breaks RGB control software on affected peripherals, and users who do not read Microsoft's warning may blame their games or hardware vendors when their lights stop working. The deeper issue, that kernel changes in Patch Tuesday updates can destabilise third-party drivers, is structural and is unlikely to be fully resolved by a single future update.
