Microsoft Now Says Your RGB Lighting Is Why Windows Keeps Crashing Your Games, and There Is a Registry Fix

The culprit behind two weeks of Windows 11 game crashes turns out to be sitting inside your case, glowing.

Microsoft has now named RGB peripherals and components as the trigger for the game failures that started after the August 11 Patch Tuesday rollup. In its Windows release health update, the company said the issue involves peripherals or internal components with RGB lighting features, which “may install drivers or code components with file names similar to inpoutx64,” and that the crash fires when certain games launch on systems where those drivers are present.

We reported on Microsoft opening the investigation after Embark Studios publicly pinned the problem on KB5121003. Embark has since confirmed Microsoft’s conclusion about inpoutx64.sys, while adding that the breakage stems from changes to the Windows kernel driver itself. Microsoft has not conceded that point.

As of Monday there is an official temporary workaround, and it is a registry edit. Open regedit, navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\inpoutx64, set the Start value to 4, and reboot. Back up the registry first, because you will want to reverse this once Microsoft ships a real fix. Microsoft also warns that disabling the driver can break RGB functionality on your peripherals or the software controlling them, which is the tradeoff: working games or working lighting, pick one.

Affected titles Microsoft has named are ARC Raiders, MARVEL Tokon: Fighting Souls, and The Finals, on Windows 11 24H2 and 25H2. Symptoms include games hanging, closing without warning, throwing EXCEPTION_ACCESS_VIOLATION, or triggering an unannounced system restart. The update itself is KB5121003, which takes 25H2 to build 26200.9168 and 24H2 to 26100.9168.

Rolling back the update is the wrong move here: The August rollup closed more than 400 vulnerabilities including one under active exploitation and two publicly disclosed zero-days. Uninstalling it to fix a game crash trades a stability problem for a security one. The registry workaround, whatever its cost in lighting effects, is the better option.

inpoutx64.sys is an old signed driver that a surprising amount of RGB and monitoring software has shipped alongside for years. Most people have no idea it is on their machine, and nothing about a crashing game points toward the fan controller. If you have been blaming your GPU driver for the last two weeks, check C:\Windows\System32\drivers for the file before you reinstall anything else.

Microsoft says it is still working to understand the relationship between the RGB components and the games that trigger the issue, and is asking affected players to file through Feedback Hub. No timeline on a proper patch.

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