Inline VisualForce Page to Freeze/UnFreeze the User without Having Manage Users permission to Profile.

Page:

<apex:page standardController="user" extensions="Freezer" id="pg">

    <apex:form id="frm">

        <apex:pageBlock >

      <!--     <span style="font-size:16pt;font-style:bold;color:red;"> Press The Button to Freeze/Unfreeze The User </span> -->

           <apex:commandButton style="width:150px;height:50px;background:green;color:white;font-size:14pt;font-style:bold" action="{!Freezermethod}" value="{!btnname}" oncomplete="RefreshPrimaryTab('{!user.id}')"/> 

        </apex:pageBlock>

    </apex:form>

    <script type="text/javascript">

        function RefreshPrimaryTab(id) 

        {

                  window.top.location.href = '/'+id+'?noredirect=1&isUserEntityOverride=1';

        }

   </script>

</apex:page>

Controller:

public class Freezer {

    public string btnname {get;set;}

    set<id> ids=new set<id>();

    user urs = [SELECT Id,Name FROM User WHERE      id=:apexpages.currentpage().getparameters().get('id')];

    

    public Freezer(ApexPages.StandardController Controller) {

        

        UserLogin users = [SELECT IsFrozen,UserId FROM UserLogin WHERE UserId=:urs.id];

            if(users.isFrozen)

                btnname='Unfreeze';

            else

                btnname='Freeze';

        }

    

    public void Freezermethod(){   

      UserLogin users = [SELECT IsFrozen,UserId FROM UserLogin WHERE UserId=:urs.id];

             if(users.isFrozen) 

                users.isFrozen= false; 

            else

                users.isFrozen= true; 

            update(users); 

        }

        

    }

Note:This Page will work only After It is added to the User Page layout Other wise it will display QueryException.