Microsoft confirms Windows 11 can cause PCs to crash games and unexpectedly reboot due to RGB software following the latest KB5121003 update.

Tightened kernel handle validation in the latest Windows 11 release triggers unexpected crashes, forcing gamers to weigh security against system stability.

Microsoft is investigating a potential issue with the August 2026 updates that may prevent some games from launching or cause them to crash on affected Windows 11 systems.