Open Command Prompt as Administrator and type slmgr.vbs /rearm . Restart your computer and try entering the key again.
Log into your account on the provider’s website. Look for "Devices" or "Active Installs." activation key has already been used on this instance
If you are working in a cloud environment (AWS, Azure) or using VMware: Open Command Prompt as Administrator and type slmgr
If you imaged a machine that was already activated, the "Clone" will carry the old instance ID, causing a conflict. Use Sysprep to generalize the image before deployment. 5. When to Call Support activation key has already been used on this instance
Activation failed Reason: This key is already tied to this instance. Next step:
Are you seeing this error on a or a specific third-party application like Adobe or Office?
This usually happens when: