How To Block Websties Without Software, block websites
 Steps:

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 127.0.0.1 www.site name you want blocked.com , and that site will no longer be accessable.
5] Done!

-So-

127.0.0.1 localhost
127.0.0.1 www.facebook.com

save  and check.....  www.facebook.com is now unaccessable.