A point of practice. Capitals mean you are shouting and as such are frowned upon. We can `hear` normal text just as well.
Spybot S&D should run quite happily with your McAfee as the `TeaTimer` function is the only part that runs continually and may slow your PC. This can either be disabled during installation or stopped using the `Advanced Mode/Tools/Resident` and unticking the `TeaTimer` function if you find it a problem.