When you try to open Task Manager, the following error may occur
Task Manager has been disabled by your administrator
Cause Of the error
1. You use account that was blocked via the “Local Group Policy” or “Domain Group Policy”.
2. Some registry settings block you from using “Task Manager”.
3. could be Because of spyware or Virus
Using the Group Policy Editor in Windows XP Professional
Click Start, Run, type gpedit.msc and click OK.
Under User Configuration, Click on the plus (+) next to Administrative Templates
Click on the p
lus (+) next tSystem, then click on Ctrl+Alt+Delete Options
Find Remove Task Manager in the right-hand pane and double click on it
Choose the option “Not Configured” and click Ok.
Close the Group Policy Window
Try to download Combofix from here and run in your computer after finishing this you need to reboot your PC.
Delete the restriction in the registry manually
Click on Start, Run, and type REGEDIT and press Enter
Navigate to the following branch
HKEY_CURRENT_USER \ Software \ Microsoft \ Windows \ CurrentVersion \ Policies\ System
In the right pane, find and delete the value named DisableTaskMgr
Close the registry editor
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