How to solve the shutdown button in Win7 computer is gone

Method 1,
1, enter "ldped;gpedit.msc" in the dialog box, press Enter to open the group policy window;
2, then in the group policy window that opens, double-click "Administrative Templates" "“ ; taskbar and "start" menu, then double click on the right side of the "delete and block access & lsquo; shutdown & rsquo; command & rdquo;;
3, in the pop-up "delete and block access & lsquo; shutdown & rsquo ; in the command properties & rdquo; window, switch to the "Settings" tab, select “ disabled & rdquo;, then OK.
Method 2,
1. Click Run in the Start menu and enter “regedit.exe”, press Enter to open the Registry Editor;
2, then expand to “HKEY-LOCAL- MACHINESOFTWAREMicrosoftWindowsCurrentVersionpoliciessystem”;
3, then find and double-click the "shutdownwithoutlogon" option on the right side of the window, and change its value to 1.
Method 3,
1, the problem is still not resolved, then enter the registry, and then expand to the HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionPoliciesExplorer, check whether there is Noclose key value in the right window, and then change its value to 0 or Delete it, then save and exit.
Method 4,
If the problem still exists, restart the computer, press F8 to enter the advanced settings of the security mode, and click to enter the last correct configuration & rdquo; mode to enter the computer.