A trick to get a clean version of windows7 system installation

First, after you download a virtual CD-ROM installation, extract the windows 7 system installation files and put them in any folder on the non-system disk. Remember the folder, will be used later,
Then copy the boot folder, sources folder and bootmgr file in the window7 folder to the root directory of the non-system disk, (if you don't want to be so troublesome, please go to the installation file) You can directly put the windows7 installation file to the root directory of the non-system disk,)
Then change the drive letter name of the c drive to English, and write it down:
Backup c disk important files
Restart, pay attention to the boot option on the screen when restarting. Generally, the second option is to select the startup option other than the current system. By this step, you can basically succeed.
Next Step
When the installation language and regional prompt appear on the screen, you can click the next step directly, then remember not to click the installation, you need to click the repair system option
Wait until there are many options (such as dos and other options), select the last option, there will be a command prompt window
(this step can be removed from the C drive new installation) enter the following characters formatc: /q click enter Then there will be an option to enter the c drive letter, input such as: xitong click enter
Then the confirmation option will appear, Y /N input Y and there is a confirmation option directly click on the carriage return, wait for the system to format c drive
After formatting the c drive, enter the following characters: e:win7sourcessetup.exe (here the e drive and win7 folder are entered according to the specific path where you started saving the installation file)
The installation officially started. If you download the Chinese version of the system file, click on the next step to install it automatically, wait about 30 minutes to install it.
If you download the English version, This is to choose the language, time zone, and keyboard you need to install. It is recommended that you do not understand English. The best choice is to install the Chinese version.
After waiting for the installation, you will be prompted to enter the computer name and user name. Enter your relevant information. Click Next to enter the registration code. You can ignore it. Click The next step is to prepare the first time you use the relevant program, and then you can use win7 normally. Then set up your broadband connection, the first time after the installation is recommended to update the system immediately, there will be information about the driver update. There is nothing difficult in the future.