Computer's task manager sometimes is disabled by virus or sometimes disabled by someone.
Don't worry because there are 2 ways how they disable it
First way is from there registry
there are some several step to do it
1 Click Start>>Run (if Run away, read the tutorial below)
2 Type "regedit"
3 Once the Registry Editor appears, click Edit>>Find
4 Type "DisableTaskMgr", and then click>>Find Next(normally it located at "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System". sometimes it also at "HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\System")
5 Click 2x "DisableTaskMgr" key
6 Change value from 1 ( disable) to 0 (enable)
Note: deleting "DisableTaskMgr" key also can enable your task manager
7 Press "Enter" or click "OK"
8 Try pressing Ctrl + Alt + Del.(If it fails, try the second ways)
some of computer doesn't has "DisableTaskMgr". This file happens when we got some virus, make it by ourselves or using some antivirus which can disable or enable Task Manager
The second ways:
1 Click Start>>Run
2 Type "gpedit.msc"
3 Go To "Local Computer Policy>>User Configuration>>Administrative Templates>>System>>Ctrl+Alt+Del options"
4 Click 2x "Remove Task Manager"
5 Choose "Not Configure" or "disable" for enabling task manager "enable" for disabling task manager
6 Press "Enter" or click "OK"
7 Try pressing Ctrl + Alt + Del.
