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How to upgrade to windows 7
Find your product key.
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.
Write down your computer name.
It's possible that your pc name will be required, so it's best to be prepared. Back up your files! The most common mistake is human error, so make sure your files are copied to a dvd, external hard drive or flash drive.