GoKawiilMicrosoft says ongoing issues causing games to crash or fail to launch after installing the August 2026 Windows updates may be caused by peripherals with RGB lighting.
As Microsoft explained when it confirmed it's investigating on Wednesday, this known issue affects games like ARC Raiders, MARVEL Tōkon: Fighting Souls, and The Finals on systems running Windows 11 24H2 and 25H2.
"Following the release of Windows updates on August 11, 2026 (KB5121003) and later, Microsoft received reports of issues involving inability to run games as expected," Microsoft said on the Windows release health dashboard.
On impacted PCs, users are also experiencing gaming freezes, "EXCEPTION_ACCESS_VIOLATION" errors, and even unexpected system restarts.
In a Thursday update, Microsoft said the gaming issues may be caused by drivers or components installed by RGB devices on affected Windows systems.
"Ongoing investigation indicates that this issue is related to peripherals or internal device components which have RGB lighting features. Such devices may install drivers or code components with file names similar to inpoutx64. In systems where these drivers are found, the issue is then triggered by launching certain games," it noted.
"We are presently working to understand the relationship between these RGB components and the games which trigger this issue. We will provide an update when more information is available."
Unofficial workaround shared by game dev
Embark Studios, the Swedish video game developer behind ARC Raiders and The Finals, also said these issues are caused by inpoutx64.sys, but added that they stem from changes made to the Windows kernel driver.
"We're aware of a crash that has been impacting some players since the most recent Windows update (KB5121003). This is a crash related to the file inpoutx64.sys, which changed with the Windows update," Embark said on Monday.
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