HOW TO RESTRIC WEBSITE ON YOUR PC?

1) Go to this directory [c:\windows\system32\drivers\etc]
2) then hit enter
3) find a file named "hosts"
4) Right click on it and open with NOTE PADE
5) In the last link of the document type the IP* address of 127.0.0.1 www.Google.com (Vice versa for other sites)
6) now save it
7) restart the browser.