Are you having during the installation process? Buy Halo Wars 2 | Xbox
It is standard practice to temporarily disable antivirus during installation and block the game’s executable in your firewall to prevent it from attempting to connect to official Microsoft servers. Are you having during the installation process
Since it's a UWP game, you must enable Developer Mode in your Windows 10 settings (Settings > Update & Security > For developers) before installation. Are you having during the installation process
Launch the game through the Windows Start Menu rather than the folder executable. Are you having during the installation process