1. Start up Registry Editor.
2. Navigate through HKEY_CURRENT_USER, Software, Policies, Microsoft and Internet Explorer.
3. Create a new key in Internet Explorer called InfoDelivery.
4. Create a new key in InfoDelivery called Restrictions.
5. Inside Restrictions, create a new DWORD and call it NoSearchBox.
6. Set the value of NoSearchBox to 1.
Set the value of NoSearchBox to 0 and restart to restore search box.