Side-loading apps require a Windows 8 side-loading key.

• If using Windows 8 Enterprise Edition and the device is domain-joined, the device is automatically considered side-loading enabled
• If using Windows 8 Enterprise edition in a Workgroup or Windows 8 Pro Edition, obtain and install a side-loading product key for each device

For domain-joined devices:

• Ensure that the Allow Trusted Apps to Install group policy is enabled.

To obtain a temporary developer side-loading key:

1. Open the start screen. 
2. Type in powershell. 
3. Right-click on Windows PowerShell. 
4. Click Run as administrator.
5. Once PowerShell opens, type the following: Show-WindowsDeveloperLicenseRegistration. 
6. Press Enter.
7. This opens a dialog asking to agree to the Windows 8 Developer License. 
8. Agree to the license.
9. A prompt asks to log in to a Microsoft account.
10. Once the account is verified, a message appears saying that the user has a developer license. It states the expiration date.
11. Run this process again after the expiration date.
12. Close PowerShell.

To check the developer license status, use the following PowerShell command:

• Get-WindowsDeveloperLicense

It returns an object stating whether the license is valid, and what the expiration date is. Remove or deactivate the developer license using the following PowerShell command:

• Unregister-WindowsDeveloperLicense

Related Documentation:

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