Authorized vendors and marketplaces like Indigo Software or Newegg often still carry stock of retail or OEM keys.
If you have an unactivated Windows 10 installation, go to Settings > Update & Security > Activation and select Go to Store to purchase a digital license directly. buy new windows 10
As of early 2026, buying a new license requires a few specific steps, as Microsoft has officially ended standard support and prioritized Windows 11. 1. Where to Buy Authorized vendors and marketplaces like Indigo Software or