how to Block or unblock any website on your computer.?

Which came to me in an email that someone had asked someone else to block websites is the way. So the thought that someone would have told such a way so as to block the site .Do you have any younger siblings spent time studying much is left in orkut ? Let's try to block orkut Come on .
Go to File Explorer on your computer , then you have to find the Drivers folder , for example, in Windows XP, the C: \ Windows \ System32 get inside . Search Drivers folder inside the folder etc now . Windows XP, you still have to meet according to the C: \ Windows \ System32 \ Drivers \ etc folder will .
Inside this folder you will see a file whose name HOSTS, the file you have to change a little bit . Notepad Rate this file (Notepad) to open with it. ( If you double-click the file , which will open a window asking which program to open it with the help of , by selecting him with the help of Notepad Open the Search and relax ) .
At the end you will see it written on the Open File - 127.0.0.1 localhost
Just then the site you want to block him at the end ( ie the last line of the file ) , please write like this - 127.0.0.2 www.orkut.com Please Save the file then .
If you would like orkut now open in the browser that will not open , so you can block any site that contains adult content .
Orkut again brought into use , please remove the file from the line 127.0.0.2 www.orkut.com . After No Change Do not forget to SAVE the changes .
I have tried to test it in Firefox and IE 8.0 . Remember you have to find out the HOSTS file , to change .