I now have Norton Security after previously using NIS. Since it is also supposed to help to tune up a PC like Norton 360 was supposed to do before it my question concerns using Iolo System Mechanic.I have also had Iolo System Mechanic for 3 years and it 's subscription for continued access use of the latest software is up for renewal on 23rd March. Is it worth the cash or is Norton Security for tuning up really sufficient even if System Mechanic were uninstalled ?