Because Microsoft no longer sells the software, your options are limited to secondary markets and remaining old stock from third-party retailers:
Buying a genuine copy of online is significantly more difficult today than it was during its peak. Microsoft officially ended its retail availability in 2013 and discontinued all support on January 14, 2020. Consequently, you cannot purchase a "genuine" key directly from the Microsoft Store anymore. Where to Buy Genuine Windows 7 Safely
: While official stock is gone, third-party sellers on Amazon sometimes offer physical copies. Detailed Review of Windows 7 in 2026
: Some authorized resellers may still hold rare old stock of retail packs or OEM (Original Equipment Manufacturer) licenses.
: These are the most common sources for "New Old Stock" (NOS). Look for listings that include the physical Certificate of Authenticity (COA) sticker and the original DVD to ensure legitimacy.
While Windows 7 remains a favorite for many due to its simplicity, it is important to weigh its current state before purchasing: Is Windows 7 Worth It In 2024 (15 Years Later)?