Windows 11 Update KB5121003 Is Crashing Some Games, and Microsoft Says RGB Software May Be to Blame
A recent Windows 11 update is causing frustration for some PC gamers, with reports of games freezing, crashing, or even forcing systems to restart unexpectedly. Microsoft has now pointed to an unusual culprit: software and drivers connected to RGB lighting devices.
The issue appears after installing the August cumulative update for Windows 11, known as KB5121003. According to Microsoft, the problem is not being caused directly by RGB lighting hardware itself. Instead, the crashes seem to be linked to certain drivers and software components that come bundled with RGB peripherals, internal PC components, and lighting-control utilities.
Microsoft says its investigation suggests the issue is connected to devices or internal components that include RGB lighting features. Some of the affected software uses file names similar to inpoutx64, which may conflict with certain games after the latest Windows 11 update is installed.
So far, Microsoft has confirmed problems with three games: ARC Raiders, MARVEL Tōkon: Fighting Souls, and THE FINALS. Players may experience different symptoms depending on their PC setup. In some cases, the game may freeze or stop responding. In others, it may close suddenly, show an EXCEPTION_ACCESS_VIOLATION error, or cause Windows 11 to reboot without warning.
The driver at the center of the issue appears to be inpoutx64.sys. This is a low-level driver that can be installed by different hardware-monitoring tools, motherboard utilities, and RGB lighting-control programs. Because many gaming PCs use RGB-enabled keyboards, mice, fans, RAM, motherboards, and graphics card accessories, the issue could affect a wide range of systems.
Embark Studios, the developer behind ARC Raiders and THE FINALS, previously confirmed that changes involving the inpoutx64.sys file after the Windows update were responsible for crashes in its games. The studio has offered a temporary workaround that removes the problematic driver, allowing affected players to launch and play normally again.
Microsoft has not yet released an official fix for the Windows 11 gaming crash issue. The company says it is still investigating the connection between the update, RGB-related software, and the affected games. In the meantime, Microsoft is asking users who experience crashes to report the problem through the Windows Feedback Hub so it can gather more data.
For now, players affected by the KB5121003 update may want to check whether their system has RGB-control software or hardware utilities installed, especially programs linked to lighting effects, fan control, motherboard tuning, or peripheral customization. However, users should be careful when removing drivers or system files and should only follow trusted instructions from the game developer or Microsoft.
The situation highlights how even small driver conflicts can create major problems for PC gamers, especially on systems packed with customization tools and RGB-enabled hardware. Until Microsoft releases a permanent patch, the safest approach is to monitor official updates, report crashes, and use available temporary fixes only when necessary.
