New
#11
To Add Windows Vista Boot Option to Windows 7 Boot Menu
Open Command Prompt as an administrator or an elevated prompt and type
C:>bcdedit
This will list the current boot manager configuration. Note down the identifier key which is in the format
{e96c8447-8171-11de-9007-b10454ebd432} or something like it.
C:>bcdedit /copy {current} /d “Windows Vista”
This will copy the current bootloader into a new entry for Windows Vista. However selecting it will still boot into Windows 7.
C:>bcdedit /set {e96c8447-8171-11de-9007-b10454ebd432} device partition=D:
C:>bcdedit /set {e96c8447-8171-11de-9007-b10454ebd432} osdevice partition=D:
bcdedit /displayorder {e96c8447-8171-11de-9007-b10454ebd432} /addlast
These two commands will set the new boot entry to point to your Vista partition and load from it.
You can reboot and see the changes.