How do I add IP address to Restricted Sites

I have been searching for a part for my car for a couple of weeks now. Sometimes I will click on a site and it will scan my computer and tell me I have a virus (ya right).This has happened 3 times so far and I wanna put a stop to it

In every case the IP address starts with 209.59.***.**

So how do I add this to my restricted sites so that anything that starts with this IP address is blocked? In other words, I want to block everything that starts with http://209.59

 

I do thank you for your response

A friend of mine told me how to block the IP addresses with out having to add a 100 addresses and it works. He told me the wildcard * also works at the end so all I have to add is http://209.59.237.*

If I want to block a bigger range its as simple as http://209.59.200-300.*

I didn't know it was that simple, again I do appreciate your response