Reinstall the system of Dell laptop, change Dell computer from Win10 to Win7

Encountered a problem that requires reinstalling the system on a Dell laptop? This article is written by php editor Baicao to introduce in detail the method of reinstalling the system of Dell notebook and the steps to change Dell computer from Win10 to Win7. The article provides clear operation guides to help you quickly solve the problem of system reinstallation. Continue reading for details to easily reinstall your Dell laptop and change your Win10 system back to Win7.

I received a request for help from a young lady abroad. Her Dell laptop could not be started and could not enter the system. After the editor's remote guidance, the lady was also very patient and finally successfully installed the system. Now the details are The tutorial is posted, I hope it will be useful to my friends.

The tutorial is divided into three steps: making PE boot disk, Dell notebook BIOS settings, and system installation.

The first step is to make a PE boot disk

1. Download the "Xingyu Liyun USB Maintenance System" and the download address is from Baidu.

2. The downloaded file is a .zip compressed package, which needs to be decompressed before it can be run (the lady does not know how to decompress, so it took me at least half an hour to explain this problem to her). The computer needs to have decompression software 7-zip, WinRAR, etc., right-click the compressed package and "Extract" or "Extract to...".

3. After unzipping, open its folder and run the application "Xingyuliyun Startup Maintenance System".

#4. Select the U disk (backup and save the files in the U disk first), select "USB-HDD+" for the boot mode, select "Tool built-in" for the tool configuration, and then select Start and wait for completion. After closing, there will be a QR code with "2345 Browser" and "2345 Security Guard" checked. Cancel it, otherwise it will be installed.

5. Download the system installation package (Win7 or Win10), drive the President Universal Network Card Green Edition (unzip), and copy it to a USB flash drive for later use. (The system can be downloaded from "MSDN I tell you", and the "Driver President" can be downloaded from Baidu)

Second step, Dell notebook BIOS settings

(You can skip it when installing Win10, and you must install Win7 Settings)

1. Enter the BIOS. When the Dell notebook is turned on and the welcome screen appears on the screen, quickly press the F2 key to enter the setting interface.

2. Turn off Secure Boot, switch to the Secure Boot page, select Secure Boot Enable and press Enter to change it to Disabled. If you install Win7 system, it must be turned off. (Remember to apply every BIOS change you make on Dell notebooks)

#3. Switch to Security and uncheck the checkbox in front of PPT On on the right side of PTT Security.

#4. Switch to General and check the Enable legacy Option Roms option on the right side of Advanced Boot Options.

5. Switch to the System Configuration item and change the SATA Operator hard disk mode to AHCI mode. Otherwise, installing win7 will result in a blue screen of 0x0000007b.

#6. Switch to General and change the UEFI in the option on the right side of BOOT Sequence to Legacy, and change the uefi boot to traditional boot (note that after changing the boot mode to legacy, you must Change the hard disk partition type to MBR, or directly use uefi+gpt boot mode to install. Be sure to keep legacy+mbr or uefi+gpt). If the boot mode cannot be changed to legacy+mbr, be careful to change the boot mode to uefi+gpt. After making changes, click Save below.

The third step, system installation

1. Insert the U disk into the computer, press F12 when booting, and select the U disk to boot (the lady’s U disk is aigo, the third item), press Enter.

#2. Wait a moment and enter the PE system desktop.

3. Open "This Computer" and find the files and photos that need to be backed up and copy them to a USB flash drive for backup (the lady's files and photos are placed on the desktop in the D:UsersdellDesktop directory)

4. Open "DiskGenius" to partition the disk. Select its hard drive and click "Quick Partition" above. For the partition table type, select MBR if Win7 is installed and the BIOS is changed, and GUID is selected if Win10 is installed without changing the BIOS. The number of partitions is divided into 2-3 according to the size of the hard disk space. Advanced settings "1" system disk size changed to 60 or larger. Align the partition to an integer multiple of this number of sectors. For 4K alignment, select 2048 sectors for Win7 and 4096 sectors for Win10. Otherwise, click OK.

5、點擊桌面上的“搜尋顯示鏡像”，會搜尋到USB隨身碟裡的系統安裝包，第一步提到下載系統安裝包複製到USB備用。

6、選取系統彈出IQI9一鍵安裝，點選開始安裝，安裝流程5-30分鐘不等，硬碟讀寫速度決定。 (更多裡面可以更改去除設定首頁)

7、完成後，在重啟之前拔掉U盤，不拔掉可能會造成盤符錯亂。

8、進入Windows圖標，等待5-30分鐘，完成後自動進入系統桌面(其間可能會卡著不動或黑屏幾下，請不要著急耐心等待幾分鐘)。

9、原版系統桌面只有回收站，我們把電腦和網圖等圖示調出來，桌面右鍵--個人化--主題--桌面圖示設置，把電腦和網路勾上。

10、運作第一步裡提到的驅動總裁，會自動安裝好網卡驅動，完成後關閉驅動總裁連上網路重新開啟驅動總裁，完成後關閉再打開，重複一次保證驅動程式全部安裝好。 (開啟驅動總裁會自動安裝驅動)

11、啟動系統，品牌電腦裝家庭版，連網後右鍵此電腦屬性，點選「啟動Windowns」即可激活，其它版本須自行下載激活工具激活。

寫在最後：

一般的人可能會頭昏腦漲，小姐姐非常聰明又耐心十足，以後必是人中龍鳳，小編在這裡衷心地感謝這位小姐姐的支持，祝福這位小姐姐事事順利。

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