TO SHOW HIDDEN FOLDERS IN WINDOWS 7
1.Open MY COMPUTER then Press the ALT key while in Explorer to bring up the File menu. Click on Tools and then Folder Options.
2.Click on the View tab and then click on the Show hidden files, folders, and drives radio button under Hidden files and folders.
The path to the Hosts file in Windows 7,Vista :
Now navigate to the directory above and open the hosts file and make your changes.
NOTE: This method for editing the Hosts file will not work. You will get a message saying you do not have permission to save in this location.
In order to edit it, you have to click on Start, type in Notepad and then right-click on Notepad and choose Run as Administrator.
In Notepad goto File->Open-> C:\windows\system32\drivers\etc\ folder again and make sure to choose all files for File Types otherwise you won’t see the Hosts file.
Make your changes to the Hosts file and click File and Save to save all changes.