To remove access to Task Manager and Windows Explorer 1 In Windows Explorer, right-click the file windows\system32\taskmgr.exe 2 Select Properties > Security. 3 Click Add. 4 Select the user you want to modify, click Add and OK. 5 Select the user you added, click Deny for full control. 6 Click OK. 7 Select Yes in response to the ‘Do you wish to continue?’ prompt. 8 Repeat steps 1 through 7 of this task for the file %windir%\explorer.exe. 9 Repeat steps 1 through 7 of this task for the file %windir%\iexplore.exe.