To access the recovery environment, turn your computer on and off three times.

The first thing you can try is booting into the recovery environment, if possible, and then performing a startup repair. But it’s not the end of the world either. If you see a black screen with gray text that reads “Windows Boot Manager” with an error along the lines of “Status: 0xc0000605 Info: A component of the operating system has expired,” then it means something went wrong with WINLOAD.EXE. This kicks off the start-up process by loading the NTOSKRNL.EXE (NT Kernel, the heart of Windows) and HAL (Hardware Abstraction Layer.) Windows 10 then performs tasks such as initializing your hardware like your mouse and keyboard and reading the Windows Registry and user profile.

The BIOS then scans the hard disk master boot record, which loads an essential file into main memory called WINLOAD.EXE. When your computer starts, the BIOS or UEFI Firmware is loaded, which performs a small set of checks on your hardware called the Power On Self Test (POST). The Windows 10 boot process is quite simple.

Windows not booting from cd