Installing WSA on Existing (not-new) systems

Is WSA effective if installed on systems that are already infected? The reason I ask is that if virus is present on install, would WSA view virus behavior as different than if infection occurs after WSA install?

I don't believe any of my systems are infected, but unless they are new, out of the box, there is always a possibility they may be infected.

Thanks
Carol

 

Welcome to the forums Yes, WSA is very effective on pre-infected systems. It is different than how WSA generally works (as it's primary goal is to keep the system clean) but we have written specific engines to clean pre-infected systems generically. Because nothing is perfect, in the event that WSA can't clean everything up automatically, it will identify this and request that you contact Customer Support, where our engineers can use some additional tools to clean up the rest of the infections.