The Windows 7 Boot Sequences
Both for the exam and for real life, you should know how to recognize common problems with the OS and make certain it is booting correctly. The sections that follow look at a number of topics related to keeping your OS booting and running properly.
Key Boot Files
Windows 7 requires only a few files, each of which performs specific tasks. These mirror Windows Vista and differ significantly from Windows XP (and previous Windows operating systems). They are discussed next in the order in which they load:
BOOTMGR The Windows Boot Manager (BOOTMGR) bootstraps the system. In other words, this file starts the loading of an OS on the computer.
BCD The Boot Configuration Data (BCD) holds information about OSs installed on the computer, such as the location of the OS files.
WINLOAD.EXE The program used to boot Windows 7. It loads the operating system kernel (NTOSKRNL.EXE).
WINRESUME.EXE If the system is not starting fresh but resuming a previous session, then WINRESUME.EXE is called by the BOOTMGR.
NTOSKRNL.EXE The Windows OS kernel.
System files In addition to the previously listed files, Windows needs a number of files from its system directories (e.g., SYSTEM and SYSTEM32), such as the hardware abstraction layer (HAL.DLL), session manager (SMSS.EXE), user session (WINLOGON.EXE) and security subsystem (LSASS.EXE).
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