Wait for the installation to complete, then reboot:
While this ruling specifically targeted client versions of Windows (like Windows 8.1), the underlying codebase for Windows Server 2012 R2 shares DNA with Windows 8.1. Consequently, there are scenarios—specifically involving volume licensing or specific regional deployments—where administrators might find themselves managing an "N" edition of Windows Server, or more commonly, managing a standard server that is missing specific media binaries due to the "Desktop Experience" feature not being fully configured. windows server 2012 r2 media feature pack
In the world of enterprise IT, Windows Server 2012 R2 has reached its end of life (EOL). However, as any systems administrator knows, legacy systems rarely disappear overnight. Many organizations still run critical line-of-business (LOB) applications, legacy intranets, or embedded systems on this robust OS. Wait for the installation to complete, then reboot: