> > Some are, some aren't. > > Which aren't? All of them eat precious cycles and memory
A well-behaved resident scanner (I use Avast 4) hardly uses any CPU cycles. It doesn't even register in Process Explorer. And RAM is just 25 megs, that's nothing these days.
> often when you don't need > it at all.
The non-stop barrage of infected machines hitting on our server would beg to differ @_@