Win10 system installs win7 system

1. Press F12 when starting up, select USB disk to start, if you can't start, please set the following three parameters

Set up the flash drive to start, (the system has been downloaded and placed in the flash drive)

The system cannot boot from a flash drive

Enter the boos interface and modify three parameters

Security- > Secure Boot- > change Enabled to Disabled security mode

Startup- > Network Boot settings are started from USB flash drive

Startup- > Network Boot UEFI/Legacy Boot-> change UEFI Only to Bother or Legacy Only

two。 Convert win10 hard disk format to mbr format

2.1 enter the installation system interface after startup, press Shift+F10 or Shift+Fn+F10 to open the command prompt

2.2. Enter diskpart and press enter to execute

2.3 enter DISKPART command mode, enter list disk enter, and list the current disk information. The GPT disk under the Gpt is marked with *.

2.4To convert disk 0, enter select disk 0 and enter clean to delete the disk partition.

Enter convert mbr, enter, convert the disk to MBR format, close the window, and then proceed to the next step.

Reference link: http://www.xitongcheng.com/jiaocheng/xtazjc_article_26779.html