To change the default operating system entry, you can use the /Default parameter for BCDEdit. The syntax for this parameter is: Bcdedit /default bootldrid where bootldrid is the GUID of the boot loader to use. You can boot to a particular installation of Windows 7 or a later Windows operating system by specifying the identifier for the related boot loader. When you view verbose details for the BCD data store, the identifiers for a particular Windows Boot Loader are listed with its entry, such as:
Windows Boot Loader
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