1. "We only lose what we don't backup." - Cnet moderators.
If you plan to upgrade without a copy of what you can't lose, that's you choice.
2. You'll want the Windows 7 Upgrade.
http://technet.microsoft.com/en-us/library/dd772579(WS.10).aspx (copy paste if this LINK doesn't work)
Amazon,.com for example has it at http://www.amazon.com/Microsoft-Windows-Home-Premium-Upgrade/dp/B002DHLUWK
Bob
I have a 2 year old Toshiba laptop with Window Vista Home premium (64 bit) and would like to upgrade to Window 7.I am a bit confused regarding what version of Window 7 I should purchase and would like to install one that prserves my present data and software. What advices can you give me and where can I purchase the least expensive legal copy? I live in the Tampa, Fl area. Thanks

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic