Win7 task manager has disappeared recovery method

Double click on the gray border to see if it can be recovered. If not, enter >;run” enter: <;gpedit.msc” Open the Group Policy Editor and find the User Settings Management Template System Ctrl+Alt+Del Options”. Double-click "Delete Task Manager" on the right side of the page, open the "Delete Task Manager" property setting page, remember not to check "“ Enabled", check "“not configured" or "ld"; Disabled ”
Workaround:
1, start----Run-----Enter regedit to confirm, open the registry to, HKEY LOCAL MACHINESOFTWAREMicrosoftWindows NTCurrentVersionImage File Execution Options .......,
Right-click on the task manager taskmgr.exe that is set up in the Image File Execution Options and select “Delete”. Then you can open the task manager (protest success)
2. First use the administrator. Log in to the system at the level of the account, then type “Gpedit.msc” in the Start menu of "Run" to open the Group Policy Editor. In the Group Policy Editor, find “User Settings → Administrative Templates & Rarr; System & Rarr; Ctrl+Alt+Del Options”. Double-click "Delete Task Manager" on the right side of the page shown to open the "Delete Task Manager" property setting page. Select “disabled ” on the selected page, click “OK” to resume using “Ctrl+Alt+Del” to open the task manager. (pro-test unresolved)
3. In Windows 2000/XP/2003, click “Start →Run”, enter “gpedit.msc” and press Enter to open “Group Policy”. Then expand “User Configuration →Administrative Templates & Rarr; System”, double-click "and block access to the registry editing tool" in the right window, select "ldquo; disabled" in the pop-up window, “ ” After exiting “group policy”, you can unlock the registry. At this point the registry has been successfully unlocked!