Downloading BEAST for Windows
The BEAST Download should be under way.
Once the file is downloaded, unzip the file and start BEAST, BEAUti or the other programs by double clicking the icon in the BEAST directory.
If the download failed, you can always get it from the release page.
BEAST does not start
BEAST requires Java version 8 or higher and won't start without it. You can get Java from Oracle, e.g here.