Now that Windows 8 has been commercially released Microsoft is no longer providing free product keys for testing. You now have three options to install Windows 8:
- Purchase a retail copy of Windows 8 for as little as $14.99.
- Install the Windows 8 Enterprise Evaluation edition.
- Create a custom boot ISO that can install Windows 8 without a product key.
The information below is from the original article posted during the Windows 8 beta and no longer applies to the final release edition. Microsoft recommends everyone on test builds to upgrade to the final version before the your installation expires.
The easiest product key to use is the public product key on the Windows 8 FAQ:
You can also get a key by running the installer on the main download page.
For those of you that are part of the Windows Ecosystem Readiness program (BUILD Conference) located on Microsoft Connect, you can request a key with this link.