Windows 7 low version hard disk installation high version method

First extract the iso file to a non-system disk, copy the boot.wim in the sources folder to the folder under the C drive Recovery folder (C:\\Recovery\\86dda334- 121c-11de-987e-001b77832650), delete the original Winre.wim file, and rename the boot.wim file to Winre.wim. After restarting, press F8 to select the repair computer to format the new installation.
No need to engrave or mass-produce U disk.
Note: The C drive Recovery folder is hidden. You need to select the hidden file to view in the view of the folder option. The Recovery folder is a protected file and you need to obtain administrative rights to operate.