if you haven't upgraded your xp to service pack 2 yet you need to go to Microsoft.com and then it will search your computer for updates to windows and it will give to you a program called windows...
An iPod Linux installer can be downloaded from the project's website at the link below.
http://www.softpedia.com/progDownload/Windows-Live-Messenger-9-Download-89148.html
a program that installes other programs eg. games
Do you mean upgrade to Windows 7 from Vista? Yes, without a doubt.