Quickly install win7 using a mobile hard drive

Make a 5G partition on the mobile hard disk, which is used to guide the installation of win7, which is very fast and convenient.
Preparation work
A mobile hard disk
A win7 ISO image file
Unzip tool (rar or zip, etc.)
Current system (windows)
Step 1: Create a partition
> Go to the current system, insert the mobile hard disk, right click "Computer", select "Manage", then double-click "Storage", and then double-click "Disk Management (Local)".



Recommended to re-partition the mobile hard disk, specifically to get a 5G size partition to store the image decompression file, and used to guide the installation of win7. So, first delete all the partitions on the mobile hard disk (delete the volume), and then create a 5G size partition (select NTFS format, the remaining space is free, how to do it all), and right click on the partition, select “ This partition is marked as active partition”. In this way, the 5G partition becomes the active primary partition. Since I have already set it as the active partition, the option to mark the partition as active partition in the picture is grayed out (not optional).



Step 2: Get the image file
You can use WinRAR and other tools to copy the files in the Windows 7 iso image to the active partition of the above mobile hard disk, and the root directory can be used. It is best not to save other files for this partition.

Step 3: Activate as boot partition
The active partition of my mobile hard disk is G drive. So, click on the taskbar "Start Menu", click "Run", enter "“cmd", press Enter, enter the following statement in the DOS window, you can activate the above active partition as a boot partition:
g:
cd boot
bootsect.exe /nt60 g:
bootsect.exe /nt60 g: /mbr
bootsect.exe /nt60 g: /force

第4 Step: Restart and set the BIOS
Finally, restart the computer, press F12 to select the boot location, select USD-HDD, and then enter the familiar win7 system installation interface. Of course, some machines press F2, ESC or other buttons, some machines need to enter the BIOS to set up, different computers, BIOS settings are different, you need to choose according to the actual situation. If you do not modify the boot location of this startup, but modify the global boot, then please remember to modify the boot automatically during the installation process, otherwise it will enter the installation boot again. Below are some screenshots of the BIOS settings for reference.
This is the first BIOS. After entering, set “Hard Disk Boot Priority” and “First Boot Device”.




This is the first two kinds of BIOS, Boot option is set to enter.