How to upgrade win7 operating system vista

Vista upgrade Windows7, vista will restart, format the C drive under winPE and then copy the bootmgr and boot directory under the win7 directory to the root directory of the c drive, and build a sources folder in the root directory of the C drive.
The boot.win under win7sources is copied to the sourse folder under the C drive. Run the command line program (shortcut Win logo key + R, type cmd) in the command line, type cd :bootbootsect.exe /nt60 c: and then prompt success is successful. (Note that bootsect is in the c:boot directory here), restart the computer, and the installer is starting.