1. Click Start -> Run, and then type regedit, then press Enter. In Windows Vista, just type regedit in Start Search, and press Enter.
2. Navigate to the following registry key:
To block Task Manager from current logged on user:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System
To block Task Manager on local computer for all users:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System
Note that if “System” does not exist, simply create a new key by right clicking on Policies, and select New -> Key, and name the new folder as System.
3. Right click System registry key, and then select New -> DWORD (32-bit) Value.
4. Name the new registry entry as DisableTaskMgr.
5. Double click on DisableTaskMgr, and assign its value data as 1.
6. Quit Registry Editor.
http://www.mydigitallife.info/2008/06/19/how-to-enable-or-disable-windows-task-manager/
2. Navigate to the following registry key:
To block Task Manager from current logged on user:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System
To block Task Manager on local computer for all users:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System
Note that if “System” does not exist, simply create a new key by right clicking on Policies, and select New -> Key, and name the new folder as System.
3. Right click System registry key, and then select New -> DWORD (32-bit) Value.
4. Name the new registry entry as DisableTaskMgr.
5. Double click on DisableTaskMgr, and assign its value data as 1.
6. Quit Registry Editor.
http://www.mydigitallife.info/2008/06/19/how-to-enable-or-disable-windows-task-manager/