Microsoft’s Windows 11 Enterprise Evaluation edition is a powerful tool for IT professionals. It offers a complete, unrestricted 90-day window to test application compatibility, Group Policy behaviors, and security features like Credential Guard and Hypervisor-Protected Code Integrity (HVCI) without purchasing a license upfront.

Once you install the Evaluation version, it is permanently locked as an evaluation build. After 90 days, the system will begin shutting down every hour, and you will lose access to critical updates and support. Converting it to a full version requires a specific, non-destructive process—or a clean reinstall.

Introduction: The 90-Day Clock

slmgr /xpr You should see: The machine is permanently activated (or a valid expiration date for KMS). If you are not ready to convert but need more testing time, you can legally extend the evaluation period. This does not convert to a full license, but buys you time.

This article covers everything you need to know: the limitations, the official conversion path, licensing implications, and how to avoid data loss. Before attempting any conversion, it is critical to understand what the Evaluation edition is—and is not.

winver The branding should now say Windows 11 Enterprise (without "Evaluation").

slmgr /dli You will see: Windows(R), EnterpriseEvaluation edition .

Guaranteed stability, no leftover evaluation artifacts, clean registry. Cons: Requires full data backup and application reinstallation.