สืบเนื่องจากกระทู้นี้นะครับ http://gotoknow.org/blog/thiraw/75913

วันนี้เลยมาเพิ่มวิธีแก้ไข task manager ให้ครับ

1. Verify that the "Local Group Policy" or "Domain Group Policy" doesn’t block you from using "Task Manager".
 
          1.1 "Local Group Policy"
 
         a. Go to "Start" -> "Run" -> Write "Gpedit.msc" and press on "Enter" button.
 
         b. Navigate to "User Configuration" -> "Administrative Templates" -> "System" -> "Ctrl+Alt+Del Options"
 
         c. In the right side of the screen verity that "Remove Task Manager"" option set to "Disable" or "Not Configured".
 
         d. Close "Gpedit.msc" MMC.
 
         e. Go to "Start" -> "Run" -> Write "gpupdate /force" and press on "Enter" button.
 
 
            1.2 "Domain Group Policy"
 
         a. Contact you local IT support team.
 
 
2. Verify correct registry settings::
 
    a. Go to "Start" -> "Run" -> Write "regedit" and press on "Enter" button.
 
 
Warning: Modifying your registry can cause serious problems that may require you to reinstall your operating system.
                Always backup your files before doing this registry hack.

    b. Navigate to the following registry keys and verify that following settings set to default:
 
Windows Registry Editor Version 5.00
 
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System]
"DisableTaskMgr"=dword:00000000
 
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Group Policy Objects\LocalUser\Software\Microsoft\Windows\CurrentVersion\Policies\System]
"DisableTaskMgr"=dword:00000000

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\system\]
"DisableTaskMgr"=dword:00000000
 
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
"DisableCAD"=dword:00000000
 
    c. Reboot the computer.