Unexpected crashes on Windows 11 version 24H2 have been reported, resulting in a secure kernel fatal error with the blue screen exception error code 0x18B. Microsoft has introduced a Known Issue Rollback (KIR) to address this issue by rolling back specific updates. For personal or non-managed computers, the fix will be automatically deployed via Windows Update, and users are advised to restart their PCs. For enterprise devices, IT departments must install the KIR Group Policy, found under Computer Configuration > Administrative Templates, and a restart of affected devices is required. The blue screen bug appeared after a Patch Tuesday update that addressed 134 security vulnerabilities, including a zero-day flaw.