Windows update KB5121003 causes multiplayer games to hang by clashing with RGB drivers

GG Brief Editorial Desk · AI-assisted, source attributed

The Windows update KB5121003 is triggering crashes and unresponsiveness in multiplayer games such as Arc Raiders, Marvel Tōkon: Fighting Souls, and The Finals. The problem is linked to a driver file named inpoutx64.sys and other drivers installed by RGB-capable peripherals or internal RGB components. Microsoft is investigating and recommends disabling the implicated driver via the registry as a workaround while advising users to back up the registry first.

• Affected games reported include Arc Raiders, Marvel Tōkon: Fighting Souls, and The Finals, which can become unresponsive after installing KB5121003.
• The driver file inpoutx64.sys — and other similarly named drivers installed by RGB peripherals or internal RGB components — is implicated in triggering the crashes.
• Microsoft identifies the interaction between KB5121003, certain games, and RGB-related drivers as the root cause and is investigating the issue.
• Microsoft provides a workaround to disable the driver through the Windows registry but warns users to back up the registry due to risk of system damage.