Found another way of blocking spam sites / pop-up ads without using any pop-up blocking/heavy anti-virus softwares. Here’s how…

1. In Windows, go to the directory…
   C:\WINDOWS\system32\drivers\etc
2. Locate the hosts file
3. Open the host file using the notepad
4. Add the domain name we want to block in this format:
   127.0.0.1         www.************.com
5. Save and close the file

and here are more links on how to use this host file…

• blocking unwanted parasites
• hosts file
• more sites