Using an outdated Windows 7 key can help you get a clean start with Windows 10.
Using an outdated Windows 7 key can help you get a clean start with Windows 10.
Purchasing Windows at a lower price often comes from securing a standard license through a retailer. This usually happens after negotiating with the store owner for a typical Windows version. When OEMs work with Microsoft, the deals tend to focus on an OEM license, which is less flexible for the end user.
I tried using an outdated Windows 7 product key to upgrade an OEM license to Windows 10 on a different machine. It looks like you can transfer even OEM licenses with a Microsoft account.