If you are wondering how to fix the kernel security check failure windows 11, one of the first things to do is to make sure that Windows and all device drivers, Mainly graphics, storage, and chipset drivers, are updated. Run the Windows Memory Diagnostic tool to identify any problems with RAM and employ CHKDSK to find any disk errors. Besides these, by running SFC /scannow and DISM commands in Command Prompt, you can repair the corrupted system files. Remove software or hardware recently installed that can cause incompatibility. And, scan for malware and check whether your system is overclocked. After implementing these fixes, reboot your PC and keep an eye on the BSOD errors that may be reoccurring.