The system design of Norton Utilities 16.0 looks much better and easier to use than the prior release 15.0, but, I have found a problem in this new release. Initial execution of 1-Click Optimization cleaned and deleted more than a thousand items at once. After this massive clean up, I noticed that internet speed got much slower right away. Before initial execution of 1-Click Optimization, internet speed was a lot faster. I assume the initial execution of this function deletes some important entries in the system that should not be deleted. I installed this new release on three PCs and I noticed same problem on all three PCs. When I restored my PC from backup, internet speed got faster. When I reinstalled this new release and executed 1-Click Optimization, it got slower again immediately. Norton programmers should fix this problem and do thorough testing and make the fixes available as soon as possible.