Win8 modified Win7 steps and common problems

        Knowledge point analysis: At present, Lenovo's factory-installed Windows 8 desktop and all-in-one use are UEFI+GPT hard disk combinations, and the security boot is enabled, but currently other Windows systems other than Window 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 from the CD to install other operating systems. The following is the specific steps for the factory pre-installed Windows 8 to modify Windows 7. Special reminder: 1, this operation will cause all data on the hard disk to be emptied, including the one-key recovery function will also be cleared, if you need to restore the windows8 system and one-click recovery function, you need to send to the service station operation, free for 1 year. (GPT hard disk needs to delete all the original partitions when converting to MBR hard disk) 2. When installing Windows 7 and other operating systems, you must use genuine installation CD, so when the partition is re-created, the installer will automatically convert GPT to MBR. Do not use the ghost disc or third-party partitioning tool to re-partition the partition. Otherwise, the system may not be installed properly or cannot be booted normally. Unpredictable situations. 3. If there is data in the hard disk, you must back up the data of the entire hard disk, not just the data. C disk data (for reasons, see the first article) Supported models: This document is only applicable to Lenovo factory pre-installed Windows 8 consumer desktop computer and all-in-one computer IdeaCentre B540/IdeaCentre B545/IdeaCentre B540P//IdeaCentre B340/Lenovo C340 /Lenovo C445 /Lenovo C345/Lenovo C440/Lenovo C540/IdeaCentre A720 /IdeaCentre K415/IdeaCentre K410 /New Dream F2999/New Dream F4039/New Dream F415/New Dream H505/New Dream F3152/New Dream H520/Home Yue s520/Home Yue S525 /Lenovo H430 /Lenovo H415 /and so on. Operation steps: First, the BIOS settings (different models of the BIOS interface may have subtle differences, please refer to the actual model) 1. Start by constantly clicking the F1 button on the keyboard, enter the BIOS interface, press the right arrow key on the keyboard ( →) Select to "Exit"; press the down arrow (↓) on the keyboard to select "OS Optimized Default", press the up arrow (↑) on the keyboard to select “Disabled”. Press the Enter key on the keyboard (Enter) to change the settings. (The OS Optimized Default option can be understood as a switch between UEFI and legacy BIOS); 2. Prompt warning, select “Yes”, press Enter to confirm; 3. Press F9 on the keyboard to restore BIOS defaults. Dialog box, select “Yes”, press Enter to confirm (when OS Optimized Default is Enabled, press F9 to restore the default value of UEFI, when OS Optimized Default is Disabled, press F9 to restore the tradition. BIOS default value) 4. Press the left arrow key (←) on the keyboard to enter the Startup interface to select the CSM option, press the Enter key on the keyboard (Enter) to set “CSM” for ”Enabled”, press Enter (Enter) Confirm (CSM: Compatibility Support Module); 5. Press the down arrow key (↓) on the keyboard to select the Boot tmode option. Press the Enter key on the keyboard (Enter) to display the settings dialog. The down arrow key (↓) is selected to “Legacy Only'; press Enter (Enter) to confirm; 6. The modified state is as follows: 7. Finally, press F10 on the keyboard to display the save dialog box. Select & ldquo; Yes & rdquo ;, press Enter (Enter) to confirm, save and exit, the computer will restart. Second, install the system boot press the F12 button, select the CD-ROM drive or U disk normal installation system on the boot selection menu. Special Note: After entering the Windows 7 system partition screen from a different location than the regular system installation, you need to click each partition separately and click Delete. After deleting all the 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.

Remind again: Do not use the ghost or third-party partition software partition to install the system, otherwise it will not start properly or other abnormal problems! Third, special problem handling You may encounter problems: 1. The installation program can not be partitioned or partitioned can not click the next step to install; 2. Can be installed in normal partition, but in the windows startup, the windows logo is dead; 3. Prompt disk function error. 4. Other unknown problems Solution: A. On the first screen of the Windows 7 system installation, press the “Shift” key on the keyboard to activate the CMD command line mode window: B. Enter the “diskpart” command directly in the CMD command line window, and then press the "Enter" key to automatically enter the Diskpart mode: C. After entering the Diskpart mode, enter the “list disk” command and press the “Enter” button to confirm the number and location of your hard disk. The computer in the following figure has only one hard disk, and the location is: D. Enter the “select disk 0” command and press the "Enter" key to select your hard drive: E. Enter the <quo;clean” command and press the "Enter" button to remove all partitions and data from your hard drive: F. Enter the <quo;convert mbr” command and press the "Enter" key to convert the hard disk split mode from GPT mode to MBR mode: G. Enter the <;exit” command and press the "Enter" key to exit the Diskpart mode. Then, press the "exit" command again and press "Enter" to exit the CMD command line mode: H. After the operation is completed, please click the “red cross” in the upper right corner of the first screen window of the Windows 7 system installation, and then select ““y” in the pop-up window to restart your computer and restart it on the computer. To the “Lenovo” LOGO screen, press the “F12” button on the computer keyboard to enter the computer's boot settings interface. At this time, eject the CD-ROM tray of your computer, put the CD-ROM tray back in the genuine Windows7 operating system CD, and select the “CD/DVD” item in the interface and press the “Enter” button. In order to achieve the CD-ROM boot. Then follow the previous steps to install the partition system (but you don't need to delete the partition again, because the partition has been deleted before restarting the computer).

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