It's not the best solution, but it's a good workaround until the product is fixed.
Since 0.47.x (not sure exactly when), if you created a new install of Metabase on Windows, you'd find that it didn't work with the default H2 database (the one you only use for setup and testing).
Solution is to download 0.46.6 from
https://downloads.metabase.com/v0.46.6/metabase.jar
Start is as normal from the command prompt. Once it's started successfully (check using a browser), just stop it with CTRL-C.
Now download the latest release. Replace your old jar with the new and start from the command prompt again.
It should all work and you can start your setup from the latest release.