Hi, This is probably the most stupid question you've had on the forum

, but I have been using Malwarebytes for about 4 months now and from day one up until this evening it has not found one bit of malware. Now I know this should be good news, but I also use Spybot and AD-Adware and although they do not find much, they do find one or two bits every now and again, especialy the first time I ran them.
So my question is, is this normal or should I play about with the settings?
Don't all shoot me down at once.
Cheers
Mike