Should you ever find yourself confronted by this message, you’ll need this, the Java Runtime Environment (JRE), which consists of everything you need to run Java through your web browser and – through the bundled Java Virtual Machine – applications on your computer.

You might be surprised to discover which applications require Java – often, they’ll automatically bundle and install it automatically during the setup process, but sometimes it doesn’t quite go to plan, and all you’ll be told is that you need Java.

It’s also extensively used on various websites, so all-in-all it’s worth installing even as an insurance policy. What makes Java so popular? Its cross-platform for starters, so if you code an application in Java, it’ll run on any computer – Windows, Mac or Linux – that has Java installed. Windows and Linux users will need to install it separately. A very long time ago, it was even installed as part of Windows, but some legal shenanigans later, and now only Apple users have it installed alongside the operating system.

Over three billion devices use it, including – of course – computers. Java is so ubiquitous it’s almost an essential part of computing life.

Jdk 8 for windows 7 32 bit