Online marketplaces (e.g., Amazon third-party sellers, Newegg, B&H Photo) sometimes have unsold old stock. Look for sealed retail boxes. The key inside is genuine, never used, and will activate. Expect to pay $150–$300 due to rarity.
Even in 2026, the activation servers for Windows 7 are often still operational. You can attempt activation through the following steps: End of support for Windows 10, Windows 8.1, and Windows 7 windows 7 ultimate 32 bit product key
If you've purchased a legitimate copy of Windows 7 Ultimate, you should find the product key in one of the following locations: Online marketplaces (e