1. There are two kinds of restrictions : Windows common restrictions (these restrictions will affect all users of the computer) and Users Restrictions (you should select some user to set up restrictions).
2. Set up Windows common restrictions :
choose some item of Windows common restrictions
mark some check box to set up some restrictions
save modifications
3. You should reboot computer to force modifications .
4. To set up Users Restrictions you should select some user , next select some restrictions item , set up restrictions, save modifications and reboot computer.