Buy Windows 7 Sp1 -

: Buying a used PC that still has its Certificate of Authenticity (COA) sticker attached is a 100% legal way to obtain a license for that specific machine. Critical Safety & Setup Tips Updating to Windows 7 SP1 - PC Matic Home Support

: Many long-standing shops keep legal installation media and keys from older systems. This is often the safest way to ensure the key is genuine.

Microsoft officially ended sales of Windows 7 in 2013 and all extended security support in early 2023. Because of its "end-of-life" status, you cannot buy it directly from Microsoft anymore. However, you can still find legitimate "new old stock" or used licenses from third-party sellers.

: These versions allow you to transfer the license to a different computer in the future.