Sounds odd. I suggest you do another scan and see what happens and/or considering the vital importance of internet security, you could 'phone the UK advisors - at a cost on your phone bill - but worth it even to test their service. If latter is not available (be suspicious) OR if they keep you hanging on-and-on for a ridiculous length of time, OR if they don't speak good engish consider ditching them. "Malwarebytes"? Never heard of them -best to use one of the big-3 independent top-guns. I've tried the three and one slowed up the PC excessively. Also, (my) PC World Store no longer sell McAfee nor upgrades - that used to be my choice but now for my first choice please see below.
If you decide change is best, I recommend Kaspersky Pure: PC World or www.kaspersky.co.uk. Best for quality and very reasonable price. Covers EVERY aspect of security. If changing you will have to uninstall your "safety" softftware but I think that Kaspersky will do that for you on loading. Never use two security products on same PC!