Error installing CENTOS7 dual system under Win7: No valid bootloader target device found.

Installation Environment:

Original operating system: Windows 7, BIOS boot mode: EFI Mode partition mode: not GPT

The USB stick has written the Centos7 drive.

The following error occurred while installing the steps to the disk partition:

Error details: For a UEFI installation, must include an EFI system partition on a gpt-formatted disk, mounted At/boot/efi

Error cause analysis, enter the U-disk startup item selected is UEFI mode, win7 support EFI boot mode, and because the system partition mode is not GPT, so if you want to install the CentOS system in UEFI mode, you must convert the disk to GPT partition mode-- This requires that the disk under Win7 be converted to GPT mode, and all data needs to be backed up and re-partitioned.

Solution: Power on by pressing F9, in the list of startup items, there is an old boot source with the same startup program name under the UEFI type, select this startup source to start the CENTOS7 installation process

Error installing CENTOS7 dual system under Win7: No valid bootloader target device found.