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. 

Re-Enable Task manager & Registry Tools - if Disabled

When this happens both the registry editor and task manager are locked. You need to run the following commands from Start->Run to first unlock them.

1. Unlock Task Manager

REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 0 /f

2. Unlock Registry Editor

REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableRegistryTools /t REG_DWORD /d 0 /f

Remove Internet Explorer Title :

3. Using Registry Editor, delete the following value in the registry:
HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main\Window Title