BCDEdit /default
The BCDEdit /default command sets the default entry that the boot manager will use when the timeout expires.
bcdedit /default <id>
Note
Before setting BCDEdit options you might need to disable or suspend BitLocker and Secure Boot on the computer.
Parameters
<id>
Specifies the identifier of the boot entry to be used as the default when the time-out expires. For information about identifiers, run "bcdedit /? ID".
Examples
The following command sets the specified entry as the default boot manager entry.
bcdedit /default {cbd971bf-b7b8-4885-951a-fa03044f5d71}
The following command sets the NTLDR based OS loader as the default entry:
bcdedit /default {ntldr}