Alaleh,
For XP Professional:
1.. Click Start | Run.
2.. Enter gpedit.msc at the command line and click OK.
3.. Select User Configuration | Administrative Templates | System |
Ctrl+Alt+Delete Options | Remove Task Manager.
4.. Double-click the Remove Task Manager option from the Group Policy
menu. You can then disable, enable, or set the policy to Not Configured.
Remember: Since the policy in question is called Remove Task Manager, by
disabling the policy, you are actually enabling the Task Manager.
* Disabling or setting this policy to Not Configured should solve the problem. *
For XP Home & Pro:
Set the DisableTaskMgr value to "0"
http://www.winguides.com/registry/display.php/163/
Enable/Disable Task Manager:
http://dougknox.com/xp/utils/xp_taskmgrenab.htm
--
Ramesh - Microsoft MVP
http://www.mvps.org/sramesh2k
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Due to an unknown reason, windows task manager has been
disabled and I can't open it. When I use Ctrl+Alt+Delete,
a window opens which tells "Task Manager has been
disabled by your administrator" while i am an
administrator of my computer. Please guide me to enable
task manager