Task Manager, Regedit, Folder option has been disabled by your administrator

Restore Task manager, Regedit  and Folder option in (3) three easy steps:

Start > Run > Gpedit.msc

REGEDIT:

in Gpedit.msc

     User Configuration > Administrative Templates > System > open "Prevent access to registry editing tools" choose enabled > apply > ok      and    open again choose disabled > apply > OK

TASKMANAGER:

in Gpedit.msc

     User Configuration > Administrative Templates > System > Ctrl+Alt+Del Options > "Remove Task manager" choose enabled > apply > ok      and    open again choose disabled > apply > OK

Folder Option:

in Gpedit.msc

     User Configuration > Administrative Templates > Windows Components > Windows Explorer> " Remove the Folder Option menu item from the Tools menu" choose enabled > apply > ok      and    open again choose disabled > apply > OK

Now you will access all the options without any popup.