Once selected, the boot loaders take over the boot process and load the operating system in accordance with the selected boot parameters.įor additional detail on the Windows startup process refer to Windows Internals, published by Microsoft Press. The boot loaders reside in each Windows partition. It displays the boot menu, loads the selected system-specific boot loader, and passes the boot parameters to the boot loader. When a computer with multiple boot entries includes at least one entry for Windows, the Windows Boot Manager, starts the system and interacts with the user. In this configuration, the Windows Boot Manager is generic and unaware of the specific requirements for each operating system while the system-specific boot loaders are optimized for the system that they load. Windows includes boot loader components that are designed to load Windows quickly and securely. As an alternative, use the System Configuration utility (MSConfig.exe) to change boot settings. Changing some boot entry options using BCDEdit could render your computer inoperable. During development, you can use BCDEdit to configure boot options for debugging, testing, and troubleshooting your driver on computers running Windows 11, Windows 10, Windows 8, Windows Server 2012, Windows 7, and Windows Server 2008.Īdministrative privileges are required to use BCDEdit to modify BCD. The Windows boot loader architecture includes a firmware-independent boot configuration and storage system called Boot Configuration Data (BCD) and a boot option editing tool, BCDEdit (BCDEdit.exe).
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