What should I do if win10 fails to boot when installing win7?

What should I do if win10 fails to boot when installing win7?

Solution to the boot error when reinstalling win7 from win10:

1. Check the bios settings

The original factory pre-installed Win10 model, manually modify the BIOS to replace Win7 , after refreshing the BIOS, the default will be restored and the system cannot be entered. You need to re-enter the bios to modify: Set Secure Boot Control to Disabled in the Security menu; set Lunch CSM to Enabled in the Boot menu. (Comprehensive method of how to enter the BIOS when starting up computers of various brands)

2. Check the disk partition status

Does the disk partition correspond to the startup mode? If it is the MBR hard disk partition mode, the corresponding BIOS mode is Leagcy Traditional model. If it is a GPT hard disk partition mode, the corresponding BIOS mode is UEFI mode (tutorial on using a quick-boot USB disk to convert GPT partition).

3. If the boot is lost, you can directly use the quick boot pe to repair the boot.

1. Enter the main menu interface of the quick boot through the USB flash drive (USB boot disk production tutorial), use the keyboard Use the up and down keys to move the cursor to [02] Run Quick Start Win10PE and press Enter to confirm, as shown in the figure:

2. After entering the quick start win10pe system desktop, open the More Tools folder on the desktop, find the system boot automatic repair icon and double-click to open it, as shown in the following figure:

3. After opening the system boot repair tool, the system will display the words "repair successful" after automatic repair, so that the repair can be completed successfully, as shown in the following figure:

4. Reinstall the system

Redownload the system image file and reinstall the system. For details, please see: How to reinstall the system Restore win7 system from win10.

5. Create a new BCD file to repair the boot

The system file is damaged. If you don’t want to reinstall or change the system, you can enter the quick start pe system, double-click the More Tools folder on the desktop, and click on the file Find and double-click the BCD editing tool icon in the folder, and click the operation to successfully repair it.

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