Legitimately bought through hardware retailers, these are cheaper but lock the license to the first computer you install it on (motherboard). Identifying Genuine Windows Genuine Microsoft Windows 10 Home

Purchase physical or digital keys from trusted retailers such as Best Buy, Newegg, or Amazon (ensure it says "Ships from and sold by Amazon" or Microsoft).

Buying a genuine license for Windows 10 ensures your computer receives essential security updates, support, and avoids the "Activate Windows" watermark. While very cheap keys ($5–$10) are often resold Volume License keys (not truly legal for personal use), here are the safest ways to acquire a legitimate license. Best Ways to Buy Genuine Windows 10

The safest option, but most expensive. You will receive a digital license or a direct download.