Windows 8 for Windows reboot error and solution, win8win7

Windows 8 for Windows reboot error and solution, win8win7
Windows 8 for win7 bios does not recognize the usb Option

Follow these steps:

Change Secure Boot control to Disabled. Press F10 to save and restart, and press F12 to enter bios and select usb to start:

Error reported after system restart

After the system is restarted, the following situations may occur:

The solution is as follows:

Set bios options by pressing F2:

F10 save and exit and restart.

I'm DELL 17TR 3728. I changed the pre-installed win8 to win7. How can I change it back to win8 now?

Hello, check whether a random disc exists. If not, contact the after-sales service point for consultation.
Gao Yue [authoritative expert]

Dell laptop win8 really does not understand how to change win7?

Hello!
Windows 8 is pre-installed on the machine. If you want to use the system disk to install Windows 7, press F12 to start the system. When selecting the boot item, you will find that there is no CD/DVD boot option, to teach you how to solve this problem:
1. Press F2 at startup to enter BIOS
2. Change Secure Boot to Disabled under the BIOS Boot menu.
3. Change the Boot List Option to Legacy.
Press F10 to save and press F12 to restart the system. Then, you can see the boot options.