1. Press the shortcut key WIN + R to open the operation, enter regedit and click OK to open the registry;
2. Then in the pop-up registry editor, open one by one:
    HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Office\16.0\Common ,
find the OEM folder and select it, right-click to delete the entire folder, and click OK;
3. In the same way, the same as the above operation , expand one by one:
   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\16.0\Common ,
find another OEM folder, delete it, and then open the Office2016 again, the registration activation interface will no longer pop up.