Blocking a site in a computer

To block a website in Internet Explorer in Windows 7, you just need to follow the following steps:

1. Go to C:\ (i.e. the drive where your Windows is installed) -> Windows folder-> system32 folder-> Drivers folder-> etc folder.

2. In the etc folder, open file 'host' in notepad.

3. At the end of this file, type  0.0.0.0 <site you want to block>  

   E.g. 0.0.0.0 www.facebook.com

4. Save the file and exit

If you are not able to save the file in the same folder, then save it on desktop and then cut and paste it in the 'etc' folder.