Computer safety for kid.?

I have a CD back up for computer protection (website filtering for kid safety. A friend of mine needs it right away. Can she use it on her computer? I bought a program. A backup CD came with it. Anyway, her kid is being steered in the wrong direction (I know she just needs to watch his computer activity but she was there when he typed in the website and it was very inappropriate) She has several (kids) and just needs heightened filtering on one particular computer. I'm not sure what my backup is for exactly, since I downloaded the program directly. I wanted to know if I could let her use the cd. It's only good for a year I think, and hopefully by then she can afford to to something further on her own. thanx