[header] How to upgrade to windows 7 [title] Find your product key. [step] In order to save time and avoid complications, it's vital to confirm that you have a working product key; without it, trying to install windows 7 is futile. [title] Write down your computer name. 
[step] It's possible that your pc name will be required, so it's best to be prepared. [title] Back up your files! [step] The most common mistake is human error, so make sure your files are copied to a dvd, external hard drive or flash drive.