Blocking/Unblocking a Website or I.P. Address in Windows Environment

How to Block or Unblock a Website or IP Address within your Computer

1. Open the Hosts File, Go to Run Command (Win Key + R) and type in "C:\Windows\System32\drivers\etc\hosts" or alternatively go to My Computer->Windows Installation Directory (Usually Drive C: ) -> Windows -> System32 -> drivers -> etc -> hosts file
2. Open the file with notepad.. (If you are using windows Vista/7 or 8, Right Click the hosts file and select properties --> under the Security Tab, Select all options under your Username and/or Administrator such as Write,Read,Read & Execute, Special Permissions --> Click Apply and then open that file with notepad - otherwise you won't be able to save changes to your hosts file)
3. Find labels such as 127.0.0.1 localhost and move to the last line and enter the IP address of the Website you want to block along with it's name.
4. It should look like this --> 74.125.236.148 www.google.com ( IP Address SiteName)
5. Save the changes made by pressing CTRL+S..
6. You have successfully blocked www.google.com from being accessed within your computer