To refit win7 from win8, first set it in the bios, and then use the u disk to boot the installation or use the system disk to install.
Specific instructions:
step one:
To change from win8 to win7 , you need to modify the bios settings. After the change, back up the entire disk data. After installing the system, you can press F1 or Fn+F1 to enter the bios . If it does not work, you can press F12 to try:
1、进入Security—Secure Boot—Disabled
2. Enter Startup—UEFI/Legacy Boot option, change to Both ,
The following option UEFI/Legacy Boot Priority is selected as UEFI First
3. Click F10 to select yes , save the BIOS settings and exit
Step 2:
Use the U disk to guide the installation system. In this way, you can install it with Lao Mao Tao. Search the Internet for "La Mao Tao". The specific operation can be found on the official website.
It can also be installed from the system disk. When booting, press F12 to select boot from CD-ROM. During the system installation process, when it comes to the step of formatting the disk, it will prompt that it cannot be installed in the GPT format, because the win8 disk is in the GPT format, and the Mbr format is required to install the win7 before installation. The specific steps can be found at the following website: http://jingyan.baidu.com/article/08b6a591c82df414a8092224.html
After the above operation is completed, you can install it below. It doesn't matter if there is only one partition during installation, because after the installation, it can be partitioned in the system.
Note:
For Sony laptops from Win8 to Win7, please refer to the following websites:
http://jingyan.baidu.com/article/2f9b480d466cd741cb6cc2e6.html