|mmm... You might like to read this article - likely only one of many out there in web-land...|
Overal it comes over a significantly less than it claims to be..; and I suggest not worth bothering with...
Registry tweakers are two a penny; and frequently cause more problems then they claim to resolve.
There are many (free) excellent utilities about which will deal with assorted malware, pestware, popup, viruses and so on. Several are regularly suggested here at CN (and equally on one or two other reliable forums...).
If you haven't bought/paid for PC Matic then I would pass it by. If you have... you might consider seeking a refund (if possible)? Then come back here and ask for specific (reliable and free) utilities which will do "all" that the typical "all-in-one, all singing 'n dancing" utilities frequently claim - but seldom deliver.