EDITING THE SYSTEM FILES IN WINDOWS VISTA AND WINDOWS 7

When you are previously using windows xp and upgraded to windows vista or 7 you may have faced this situation.For example in windows vista and 7 when you open some system or administrative files such as c:\windows\system32\drivers\etc\hosts file in notepad for testing some tricks you are not able to save the edited file which is not a matter in XP.To edit such files drag that file to another location such as desktop and then edit and save.After saving move the file back to the original location then done.