Method 1:
The situation's pretty simple. If you right click on the clock in the Windows taskbar, the Task Manager item is grayed out:
Or, if you try to run taskmgr.exe manually, you get this message:
So, how did this happen?
As we'll see in a moment, there are settings you can access as an administrator that would allow you to disable and enable Task Manager in this way.
You didn't do that, you say?
Then a virus probably did.
Disabling Task Manager is one way viruses try to make it harder for you to deal with their infections. Before proceeding any further, you shouldrun a complete and up-to-date anti-virus scan of your machine. It's possible, perhaps even likely, that you've been infected.
Once you come back virus-free, you can proceed with the fix.
•
If you have Windows XP Pro, there's a nifty user interface to directly edit the setting you want to repair. Click Start, then click Run and type ingpedit.msc:
And press OK. This runs the Group Policy Editor.
Once in the Group Policy Editor, expand in turn:
User Configuration
Administrative Templates
System
Ctrl+Alt+Del Options
You should see something much like this:
Double click on Remove Task Manager to change its setting:
It should be enough to click on Not Configured and then OK and Task Manager is available once again.
•
If you don't have Windows XP Pro, then you'll need to edit the registry manually.
Click Start, then click Run, type in regedit, and click on OK.
Expand these registry keys in turn:
HKEY_CURRENT_USER
Software
Microsoft
Windows
CurrentVersion
Policies
System
You should see something similar to this:
Right Click on the DisableTaskMgr item:
Click on Delete, confirm that you want to delete, and Task Manager should be available once again.
Method 2:
Click Start, Run and type this command exactly as given below: (better - Copy and paste)
REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 0 /f
Method 3:
Copy The Below Text And Save As TASK.reg . Right Click And Merge it.....
Windows Registry Editor Version 5.00
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System]
["DisableTaskMgr"=dword:00000000
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