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List of contents of this article:

• 1, < A href='#AppleThe method of returning the previous version of the system' title='The method of returning the previous version of the Apple system'>The method of returning the previous version of the Apple system
• 2、How to restore the previous system on the laptop
• 3, computer system restoration method

How to return the previous version of Apple system

1. The first method: use iTunes to restore Old system First of all, you need to back up your iPhone data so that you can restore the data when restoring. Connect your iPhone to your computer and open iTunes. In the left menu bar, click the "Overview" tab, and then click the "Check for Updates" button.

2. The downgrade version of the Apple system requires the following steps: Backup data: Before downgrading, you need to back up all the data on your phone. You can back up your data through iCloud or iTunes.Download the old version of the firmware: Download the old version of the firmware you want to downgrade, which can be downloaded on the website ipsw.me.

3. Download the old version of iOS firmware: Before downgrading, you need to download the old version of iOS firmware file that matches your device model. These firmware files can be found on some third-party websites or websites specializing in iOS firmware downloads.

4. When downgrading the iPhone system, download the corresponding downgrade firmware version. The specific download method is as follows: Download the firmware of the iPhone system version through the iTools software toolbox. Please note that you must download and query the corresponding ios system firmware version.

How to restore the previous system on the laptop

Use GHOST manual recovery: If the one-click restore program is not installed, but there is a GHO backup file in the non-system partition of the computer, you can run the GHOST program to manually restore the system. If there is no backup system before, you can only reinstall the system.

Back up data: Before restoring the system, be sure to back up important data and files in your laptop to prevent data loss. Open Settings: In the Windows operating system, press the "Win + I" key combination to open the settings. Select Update and Security: In the settings window, click "Update and Security".

Click "System Restore" in the "System Protection" interface just now. Click Next in the pop-up system restore prompt window.Click to show more restore points, and you can also see the restore points automatically created by the system after the update.

computer system restoration method

1. Right-click "Computer", select Properties, and enter Click the "System Protection" tab and click "System Restore" in the "System Protection" interface just now.Click Next in the pop-up system restore prompt window. Click to show more restore points, and you can also see the restore points automatically created by the system after the update.

2. How to operate the computer recovery system: Connect the computer to the power supply, and press or click the F10 key to enter the system recovery factory interface. Method 2: Connect the computer to the power supply. In the power-on state, open the Huawei Computer Butler, click more icons, and select the settings center system to restore the factory settings.

3. If you want to restore the original system version after 10 days, or you have installed Windows 10 in other ways, you need to use installation media (such as USB flash drive or DVD) to reinstall the original system.

4. One-click restore operation steps of win7 system. Open the Win7 system desktop and click the start menu button in the lower left corner to enter. Click the "Control Panel" button on the right side of the page to open the main page of the control panel. Click the "Viewing Method" setting item in the upper right corner of the page to switch to "Big Icon" to display the page.

5. Reset this computer in advanced mode. Click the difficult solution to reset this computer in advanced mode, and follow the prompt steps to reset the operating system. You can choose to keep user data for resetting. You can also choose to delete the data for a complete reset.