How To Block Websites

Guys sometimes we want to restrict access to some particular website from our PC but we dont know how to do it without using some software for it.
Here i m sharing with you a method to do it without using any software...

1]Browse C:\WINDOWS\system32\drivers\etc
2] Find the file named "HOSTS"
3] Open it in notepad
4] Under "127.0.0.1 localhost" Add 127.0.0.2 www.sitenameyouwantblocked.com , and that site will no longer be accessable.
5] Done!