Para ativar o Windows 8.1 Pro, a Microsoft disponibiliza chaves públicas de cliente

• Use Windows 8.1 unactivated (it works indefinitely with a watermark and limited personalization).
• Consider Linux (e.g., Linux Mint) – free, safe, and runs well on old hardware.
• Look for legitimate discounted licenses from academic or nonprofit programs.

Method 2: Activating via Command Prompt (for advanced users)

Title Idea:

"How to Properly Activate Windows 8.1 Pro (Legit & Safe Methods)"

B. Use Windows 8.1 Without Activation

Companies with a Volume Licensing agreement with Microsoft can download Windows 8.1 Pro and use a Multiple Activation Key (MAK). These keys are not for individual consumers.