Microsoft Investigates Windows 11 RGB Issues Post-Update

Microsoft is actively examining a problem with Windows 11 that has arisen following the security updates released in August 2026. These updates have led to disruptions in certain games, causing them to freeze, crash, or display access-violation errors on devices equipped with RGB lighting features.

Impact of August 2026 Windows Update

The difficulties appear to be linked to devices using RGB lighting hardware and software components, particularly those involving the inputx64 driver. This issue surfaced after the distribution of the Windows update KB5121003 for Windows 11 versions 24H2 and 25H2. Microsoft acknowledged the issue on its Windows Release Health dashboard on August 19, with investigations still ongoing as of August 21.

Devices Affected by RGB Lighting Problems

Microsoft has identified that devices with RGB-enabled peripherals or internal components could be suffering from these issues. Such components include lighting controllers, keyboards, mice, fans, or motherboard accessories that may install low-level drivers similar to inputx64. Specific games like ARC Raiders, MARVEL Tōkon: Fighting Souls, and THE FINALS have been named in reports where users experienced unresponsive applications, unexpected shutdowns, and error messages like “EXCEPTION_ACCESS_VIOLATION.”

Temporary Solutions and Future Outlook

As Microsoft continues to explore the root cause, whether it’s from Windows, the RGB driver ecosystem, or the affected games, it has proposed a temporary workaround. Users may disable the inpoutx64 driver using the Windows Registry. This involves navigating to HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesinpoutx64, adjusting the Start value to 4, and rebooting the computer. However, this could disrupt RGB lighting functions. Users should consider testing changes carefully, particularly on systems reliant on vendor-specific lighting or management software.

Windows 11 versions 24H2 and 25H2 are primarily affected, with no reports concerning Windows Server platforms. Additionally, Microsoft reminded users that support for Windows 11 version 24H2 Home and Pro editions will end on October 13, 2026. Devices on these editions will cease to receive monthly security updates and technical support post this date. Users are encouraged to submit diagnostics via Feedback Hub if they encounter issues related to RGB lighting and gaming post-update.