Many friends' systems are activated with a key (MAK or retail key). Xiao Bian recommends that you back up the activation information after activation to restore it after reinstalling the system in the future. This article will introduce you to the backup and restore methods of Win8.1 activation information. The backup method is applicable to: Win8/8.1 core version, professional version, professional version (including media center), enterprise version and other versions. If you find that backing up your files is cumbersome, you can try to reinstall the system using the reload function that comes with the system. When reinstalling, it will automatically restore the activation information for you. See "My Windows 8.1 Reload Process & mdash; — Reloading Don't Worry Activation" for details. Windows 8.1 activation information backup & restore method Detailed: Backup method: 1, write down the key used for activation. 2. Copy the 2.0 folder in C:\\Windows\\System32\\spp\\store. Save the key and the 2.0 folder properly and the backup ends. Restore method: 1. After the installation is completed. Open “Services , find the Software Protection service, if the service is running, pause it (right click). 2. Copy the cache folder, data.dat file (hidden file), and tokens.dat file in the backup 2.0 folder to the same name file in C:\\Windows\\System32\\spp\\store\\2.0. (Note: Do not copy the entire 2.0 folder, please copy the files in the 2.0 folder) 3. Press Win+X shortcut, open “ command prompt (admin) & rdquo;, enter the following command to run slmgr.vbs - Ipk xxxxx-xxxxx-xxxxx-xxxxx-xxxxx Note: xxxxx-xxxxx-xxxxx-xxxxx-xxxxx indicates the activation key and replace it yourself. 4. Then enter the command slmgr -ato and press Enter. If activation is not yet displayed, or the watermark is still trying to reboot the system. About the professional version (including media center) version recovery method: Please install the professional version first, then use the trial key GBFNG-2X3TC-8R27F-RMKYB-JK7QT to upgrade to the media center version. Then follow the above method to recover. Probable problem: Sometimes the system activation status may not be restored after the activation file is restored, and an error message will pop up when running slmgr.vbs -ipk. As shown in the following figure, the prompt content "Error: 0× 80070426 On a computer running a non-core version of Microsoft Windows, run “slui.exe 0x2a 0×80070426” to display the error text. ” The reason for this problem is that sppsvc (that is, the software protection service) loses the operation authority for the C:\\Windows\\System32\\spp\\store\\2.0 folder and its subfiles (folders). Therefore, when restoring the activation file, it is recommended to restore the files in the 2.0 folder directly, instead of moving the 2.0 folder or its parent folder (ie the store folder). This way sppsvc will not lose the operation rights to the 2.0 folder and its sub-files (clip). (The result of permission inheritance). If this problem has already occurred, please restore it as follows: Open the C:\\Windows\\System32\\spp\\store\\2.0 folder property and switch to the “Security" tab. Follow the instructions below (click on the image to enlarge) to add the NT SERVICE\\sppsvc permission. Then set the sppsvc privilege to “full control”:OK, so that the activation state can be restored normally!  
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