I just want to know if I should do an upgrade from vista to 7 or do a clean install from vista to windows 7. Is there any advantage of doing clean installation?
First and foremost you should ensure that your PC is good for upgrading to windows 7. It is advisable to download and run Windows 7 upgrade advisor to check whether or not your PC is ready for windows 7. http://www.microsoft.com/windows/window ... visor.aspx
It is easy to upgrade because an upgrade will keep most of your existing applications and settings and there is little you need to do after the installation.