Hi,
Thank you for writing to Microsoft Community Forums.
I understand that you purchased Minecraft from Microsoft Store and want to install it on your computer. I’ll certainly assist you with the details.
To install Minecraft on your computer, open the Microsoft Store application on your computer, sign in with your Microsoft account through which you have purchased the game. After signing in to the Store, search for Minecraft and install it.
For additional information, see Get apps from Microsoft Store on your Windows 10 PC.
Let us know how it goes.
Regards,
Nikhar Khare
Microsoft Community - Moderator