When processing private documents on a computer, in order to maintain personal privacy, you will always delete the document history before shutdown, but repeated operation is very troublesome, how can you easily protect privacy? You can easily implement it by modifying the Registry Editor. Open the registry editor, then locate "HKEY_LOCAL_USER / CURRENTVERSION / Policies / Explorer", create a new DWORD value in the right window, name "1" (value "1" means prohibition, The value is "0" indicates allowed). When you exit the system later, the system will automatically delete the history of the document menu.