Lenovo notebook computer WIN8 system degraded win7 system diagram

Knowledge Point Analysis:
1. This operation may cause all data on the hard disk to be emptied, including one-click Restore function will also be cleared, if you need to restore the pre-installed system and a key restore function, need to be sent to the service station for recovery, free recovery within 1 years (such as when the GPT partition table hard drive to the MBR partition table hard drive needs to delete all the original partitions, Include hidden partitions).
2. If you have important data on your hard disk, you must have all the important data in the disk, not just the C disk, the desktop, and the important data in my document, but also the important data from other data disks.
Windows 8 Modification of Windows 7 requires changes to the BIOS settings, and Windows 8 uses a GPT partitioning structure, and Windows 7 only has a 64-bit CD-ROM installation system that supports this partition structure, and other installations require that all partitions of Windows 8 be removed. Therefore, before the operation, you need to remind the user to back up the data to avoid data loss.
Operation Steps:

1. Under the Security tab to find the Secure boot option, enter into the first secure boot from the "Enabled" Switch to "Disabled";

2. Press Esc key back to the main interface, under the Startup tab to find Uefi/legacy boot options, the default state UEFI only changed to Legacy only;

3. Finally press the key combination "F10" to save the exit.

4. Boot to install the media, in the last of the above operation to save the exit, the computer will restart, restart the time repeatedly press F12 key, the boot menu option, select the corresponding startup items, such as CD-ROM installation, then choose ATAPI CD0 option, u disk installation select USB HDD option;

5. Select the partition, pre-installed Windows 8 is a GPT partition (not MBR), so you need to remove all the zoning re-recommend partitions (this image is a virtual machine screenshot, so fewer partitions, pre-installed Windows 8 will have more partitions);

6. After the partition, the normal installation of Windows 7 system, and then to Lenovo official service website Download driver can be.