The most common problem faced by XP users. So here we are posting a detailed solution to resolve it. Now first take a look on the problem ?. When you press Ctrl + Alt + Del or right click to run Task Manager, you get the following error:
"Task Manager has been disabled by the administrator".
If you are the administrator then the situation is quite surprising and funny. So how it happened? As we'll see in a moment, there are some advanced settings in Windows XP, can be accessed as an administrator that would allow you to disable and enable Task Manager in this way. You didn't do that, you say? then How ? It is due to some kind of virus/ trojan activity which normally disables the Task Manager , disabling Task Manager is a way viruses try to make it harder for you to deal with their infective effects. So before proceeding any further, you should run a complete and up-to-date anti-virus scan . It's possible, perhaps even likely, that you've been infected.
Once you come back virus free, you can proceed with the fix.There are couple of methods to resolve. First we'll begin with the various registry modification methods for correcting this problem.
Method A : By using Group Policy Editor (gpedit.msc) in Windows XP Professional
1. Click Start, Run, and type gpedit.msc and click OK.
2. Now Under User Configuration, Click on the plus (+) next to Administrative Templates
3. Click on the plus (+) next System, then click on Ctrl+Alt+Delete Options
4. Find Remove Task Manager in the right-hand pane and double click on it
5. Choose the option "Not Configured" and click OK.
6. Close the Group Policy Window and restart to catch the effect.
Method B : By Registry Editor ( regedit ) if you don't have Windows XP Professional
1. Click on Start, Run, and type REGEDIT and click OK.
2. Navigate to the following branch.
HKEY_CURRENT_USER \ Software \ Microsoft \ Windows \ CurrentVersion \ Policies\ System
3. In the right pane, find and delete the value named DisableTaskMgr of type: REG_DWORD.
4. Close the Registry Editor Window and restart to catch the effect.
Method C : Change the settings directly through run command
1. Press Windows Key + R to open RUN Tab, or you can Click Start then RUN
2. Now copy paste the following Cited command and press Enter.
REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 0 /f
3. Close all windows and Restart.
Method D : By Creating Registry File
1. Start any simple texteditor like Notepad or Wordpad.
2. Copy past the following Cited code in that file and save as tm.reg on desktop.
Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System]
"DisableTaskMgr"=dword:00000000
3. Now double click on the newly created file tm.reg.
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Note : So many utility softwares are also available to make your task easy, you can search Download.com and Softpedia.com