The error Unable to update the Minecraft Runtime Environment usually occurs when the installation location of Minecraft and Java differs. Here's the fix.

This should address any configuration problems and update the Java Runtime Environment to the latest version. First, uninstall Java as you would remove any other software on your PC.

Oracle Corporationは、Java言語で開発されたソフトを実行するために必要なランタイム「Java Runtime Environment (JRE)」の最新版v6 Update 20を公開した。

To install Java on Windows you only need to follow these five simple steps. In this quick tutorial, we'll show you how to setup Java on Windows and run apps like Minecraft and Apache Tomcat on the JDK ...