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 127.0.0.2 www.sitenameyouwantblocked.com , and that site will no longer be accessable.
5] Done!
So...
127.0.0.1 localhost
127.0.0.2 www.google.com
Now www.google.com is unaccessable.
For every site after that you want to add, just add "1" to the last number in the internal ip (127.0.0.2).
IE: 127.0.0.3 www.yahoo.com
127.0.0.4 www.facebook.com
127.0.0.5 www.orkut.com
and these all will b blocked.
