Windows 7 with the former nickname of Blackcomb was set to release after Windows XP. However, Blackcomb was postponed for several years, instead, an operating system called Vista with the nickname of Longhorn declared its release in August 2001. The retail version of Windows 7 is set to be released on October 22, 2009 and will be equipped with IE8, Power shell, XPS Viewer and so on.
How to recover Windows 7 boot
First, use the compatible boot of Windows Vista, and check the real drive letter of the system disk with the command of List under Diskpartk.:
DISKPART> list disk
DISKPART> list volume
Try to use Bootsect.exe to recover the MBR of the system disk. All these can be found under the boot directory of the installation disk for Windows Vista/2008/7. /nt 60 stands for the boot manager of Vista and /nt 52 stands for the used NTLDR.
>bootsect.exe /nt60 C:
Input the boot parameter of Windows with bcdboot.exe.
Recover the boot parameter of Windows 7 with the command >bcdboot c:\windows /s c:
Recover the boot parameter of Windows 2008 with command >bcdboot d:\windows /s c:
Of course, with these commands, we can also set bootable USB drive.
Input the following cmd to set the volume of DISKPART Activate USB
DISKPART>select volume <volume # of USB drive>
Then input the cmd bootsect to make the boot sector of this USB
bootsect /nt60 <drive letter of your USB drive>
Tip: copy the boot cmd to the USB drive, and finish the operation.