Advanced system care free is a reasonable freebie that helps in general PC maintenance. Unfortunately Iobit have always been a bit OTT in the nature of their claims for its efficacy and a quick look seems to indicate they're getting worse.
"The Best System Utility in PC History"
"Dramatically improves both system and Internet performance up to 400%."
Does it do what it purports to do ? Not really but ignore the florid prose and under the spin you'll find a reasonable little product that is well worth a go.