[header] How to get windows 7 for free [title] Determine when you purchased your computer. [step] If you are running a pre-windows 7 operating system, you may be eligible for a free upgrade if you purchased the system between june 26 , 2009 and january 10 , 2010. [title] Find your serial number and purchasing information. 
[step] You may need this information during the free upgrade process. [title] Contact the people you bought the computer from.