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This method uses a generic volume license key and connects to a KMS host for verification. It is often used for evaluation or within organizational networks. Open Command Prompt Windows Key + X and select Command Prompt (Admin) Install KMS Client Key : Enter the following command and hit Enter: slmgr /ipk GCRJD-8NW9H-F2CDX-CCM8D-9D6T9 Set KMS Server : Connect to a public KMS host (e.g., slmgr /skms kms8.msguides.com Trigger Activation : Run the final command to activate the system: slmgr /ato Microsoft Learn 2. Retrieving an Embedded BIOS Key activate windows 8.1 pro build 9600 without product key