They all affect it in some way.
In my experience I recommend AVG. It's the one we urge customers to use in either the Free or Internet Security version.
It's impossible not to slow down the computer because part of the antivirus functionality is to check everything before it runs.
But surely what you mean is not to slow it down too much.
Avast works fine for me.
Avast Free Antivirus is a free antivirus that works well for me.
It_qna
They all affect it in some way.
In my experience I recommend AVG. It's the one we urge customers to use in either the Free or Internet Security version.
It's impossible not to slow down the computer because part of the antivirus functionality is to check everything before it runs.
But surely what you mean is not to slow it down too much.
Avast works fine for me.
Avast Free Antivirus is a free antivirus that works well for me.