Windows

Windows Product Keys – Every Edition, Genuine and Instantly Delivered

Genuine Windows licence keys for Windows 11, Windows 10, Windows 8.1 and Windows Server — from Home and Pro for everyday PCs, through Pro for Workstations and Enterprise, to full Server editions for business infrastructure. Every key is for one PC, works worldwide, and is delivered instantly on your order confirmation page.

Which Windows edition do you need?

• Home – personal and family PCs: browsing, Office, gaming, streaming.
• Pro – business and power users: BitLocker encryption, Remote Desktop, domain join, Hyper-V.
• Pro for Workstations – server-grade hardware, up to 4 CPUs and 6TB RAM, ReFS.
• Enterprise – IT-managed fleets: AppLocker, Credential Guard, advanced deployment.
• Windows Server – hosting, databases, Active Directory and virtualization.

Not sure which one fits? Our free Windows Edition Finder asks three quick questions and tells you exactly which edition you need.

Windows 11 or Windows 10?

Windows 11 is the current release and receives all the latest features and security updates, but needs newer hardware (TPM 2.0, Secure Boot, an 8th-gen Intel or Ryzen 2000 CPU or newer). Windows 10 still installs and activates perfectly on older machines, though Microsoft ended mainstream support in October 2025. For a new PC, choose Windows 11.

Installation and activation help

Every purchase comes with step-by-step guidance. See our activation guides, use the Confirmation ID tool if you need phone activation, or look up any error code in our error code decoder.

Every key at Keysincaves is genuine and delivered instantly on your order confirmation page the moment you pay — you can also retrieve it any time from Track Orders. Each key is backed by our 7-day activation warranty: if it doesn’t activate, we replace it. Our team is available 7 a.m. to 7 p.m. UTC through the Ticket Center.