Sorry auto1571 for risking hijacking your thread but my question seems to be also relevant to you since you also have MBAM premium. Here is what I found through observing MBAM premium in action. I have 16 gb of ram with relatively modern GPU/CPU setup for my main work computer and a old core 2 duo labtop with 3 gb of ram, so I can see what MBAM behaves in a low spec and high spec environment.
MBAM does add CPU spikes doing anything including opening browsers, installing program, to downloading large files through steam for example anything thing that need to run and access a large amount of files at once, there are tools to record and log cpu spikes and what is causing or you can simply just open task manager and watch MBAM processes for a quick test. On my modern computer you don't notice much difference in a practical sense, but it MBAM is not very light compared any AV, adding as much CPU spikes as my Avira for example. MBAM premium has a web filter and that also uses cpu cycles that you can track if you downloading large files, example a game in steam.
Doesn't make much sense to me to have both your main AV web shields on (I am using Avira Protection) and have MBAM website protection working at the same time they literally do the same job, they filter url links and the block urls that are flagged for whatever reason. However at the same time they don't seem to interfere with each other so I guess there isn't drawback to it except the added resources of having two web scanning/filtering processes at the same time.
On my old labtop, MBAM does has a noticeable lag to everything, the CPU cycles used by the antivirus along with MBAM add up and the cpu struggles when you open Firefox for example, or download large files. When the programs are already running though, there isn't that much practical difference, but MBAM again uses as much resources as Avira.
So I decided to keep on using MBAM on my modern desktop, and discontinue it's use on my old labtop. Been using MBAM premium for more than a year on my modern desktop without any issue, but at the same time it hasn't caught anything either so..... shrugs, that's not probably indicative of the quality of the MBAM, but my cautious defensive computer practices. I know MBAM scanner is highly regarded, but I don't objectively know if realtime protection is any good and worth the extra cpu cycle and resources it add, it isn't independently tested by AV comparative or AV test or any other independent so I guess I will just take their word on its effectiveness.
Edited by Nealis, 19 August 2016 - 02:05 PM.