Hi Jordan,
Players who already have the previous PC or Mac edition of Minecraft (running on Java) can download Minecraft: Windows 10 Edition for free. There is no need for a license transfer. Just make sure that you downloaded the Minecraft: Windows 10 Edition and
used the same Microsoft account email address. To properly isolate your concern, please provide us the following information:
- Are there any error messages when you tried to sign in on Windows 10?
- Have you already activated the code for Minecraft: Windows 10 Edition on your Windows PC?
- Is the
Xbox Live Service Status up and running?
In the meantime, you can also visit this
link for additional information about the Minecraft: Windows 10 Edition.