In my previous post I wrote How to enable Task Manager in Windows XP. Here you can find how to enable/ disable the Task Manager in Vista - Following method is applicable to all the versions of the Vista Step 1 : Open the Start Menu. Step 2 : Then in the white line (Start Search) area, type regedit and press Enter. Step 3 : Click on the Continue button in the UAC prompt. Step 4 : In regedit, go to: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System NOTE: If you do not have System, then right click on Polices and click on New and Key. Type System and press Enter. Step 5 : In the right pane, right click on DisableTaskMgr and click on Delete. and click on Yes to confirm delete. Step 6 : Close the regedit. Step 5 is to Enable the Task Manager. If you wanna disable the Task Manager then do the following step instead of Step 5 Step 5 : In the right pane, right click on a empty area and click on New and DWORD (32-bit) Value and type DisableTaskMgr and press Enter. Right click on DisableTaskMgr and click on Modify. Type 1 and click on OK. Then finally do the Step 6. Good Luck :)