Lenovo Win8 system replaced with WIN7 how to change BOIS

before Lenovo factory pre-installed Windows
8 desktop and all-in-one use are UEFI + GPT hard drive combination, and open a safe boot, but currently in addition to Window Other Windows
systems other than 8 do not support this mode, so if you need to modify other systems, such as Widndows 7, you must work in the traditional BIOS + MBR mode.

If you do not modify any settings, you will not be able to boot other OS
from the CD.

The following is the specific steps for the factory pre-installed Windows 8 to modify Windows 7.

1. This operation will cause all data on the hard disk to be emptied, including the one-click recovery function. If you need to restore the windows8 system and one-click recovery function, you need to send it to the service station for free. (GPT hard disk needs to delete all the original partitions when converting to MBR hard disk)

2, you must use the genuine installation CD when installing Windows 7 and other operating systems, so when the partition is re-created, the installer will automatically GPT is converted to MBR. Do not use the ghost disk or third-party partitioning tool to re-partition the partition. Otherwise, the system may not be installed properly or cannot be booted normally. Unpredictable conditions

3. If there is data in the hard disk, You must back up the data of the entire hard disk, not just the data of the C drive

Operating steps:

First, the BIOS settings (different models of the BIOS interface may have subtle differences, please take the actual machine Type is subject to change)

1. When you start, keep clicking the F1 key on the keyboard to enter the BIOS interface.

Press the right arrow key on the keyboard (→) to select &Exquo;Exit”< Br>

Press the down arrow key (↓) on the keyboard to select “OS Optimized Default",

Press the up arrow key (↑) on the keyboard to select “Disabled”.

Press the Enter key on the keyboard (Enter) to change the settings.

(OS Optimized Default option can be understood as UEFI and traditional BIOS switching);

2. Prompt warning, select “Yes”, press Enter to confirm; 3. Press the F9 key on the keyboard, the Restore BIOS Defaults dialog box appears,

Select“Yes”, press Enter to confirm

(When the OS Optimized Default option is Enabled, Press the F9 key to restore the default value of UEFI. When the OS Optimized Default option is Disabled, press the F9 key to restore the default value of the traditional BIOS.)

4. Press the left arrow key (←) on the keyboard to enter the Startup. Interface

Select the CSM option, press Enter on the keyboard (Enter)

Set“CSM” for ”Enabled", press Enter (Enter) to confirm

(CSM: Compatibility Support Module);

5. Press the down arrow key (↓) on the keyboard to select the Boo tmode option

Press the Enter key on the keyboard (Enter) The setting dialog box appears

Press the down arrow key (↓) on the keyboard to select “Legacy Only&

Press Enter to confirm;

Finally, press F10 on the keyboard to save the dialog. In the box, select “Yes”, press Enter to confirm, save and exit, Computer
will restart.

Second, install the system

Start the F12 key, select the CD-ROM drive or U disk to install the system normally.

Special Note:

After entering the Windows 7 system partition screen with a different system installation, you need to click each partition separately, and then click Delete.

After deleting all partitions, click “New” to recreate the new partition. (Restricted by the MBR hard disk, you can only divide 4 main partitions in the system installation interface. If you need more partitions, please partition the system after the system is installed.) After the partition is created, partition the partition first. After all formatting, after formatting is complete, select the partition where you want to install the system, click “Next “ to install the system.