Where did you buy the vista disk from? was it a retailer or did you get it online?
EDIT- got this from the microsoft website-
Essential details: When you buy Windows Vista Home Premium, Business, or Ultimate either as a packaged product
or on a qualifying PC you can get a comparable upgrade version of Windows 7 after it’s generally available on October 22, 2009. Qualifying PCs, offer details, and product delivery methods will vary by manufacturer, so check their sites for specifics. If you buy a packaged copy of Windows Vista you can order your upgrade from Microsoft
. The Windows 7 Upgrade Option program runs from June 26, 2009 through January 31, 2010. However, individual PC manufacturers may choose to offer the option for a shorter period. For full details, see the FAQ.
So you may be qualified if you bought it after june 26. Not sure if activation date counts. Heres the link to the page = http://www.microsoft.com/windows/buy...s/upgrade.aspx
EDIT- Go here and fill out the form, it will tell you whether or not your good to go https://om2.one.microsoft.com/opa/Va...caleCode=en-us