maleware bytes

I seethis being suggested time and time again.

 

1. Is it safe to use? (i'm sure yes otherwise reliable people on here would not sayto do so, but I have to ask anyway

 

2. Can you do it as an online scan or do you have to download the program?

    I really prefer to not download another program on my machine

 

3. Is SpyBot S&D almost as reliable? I have that downloaded on my machine already