Java Runtime Download Page . Once you have Java™ software, you'll have  access to a whole new world of interactivity. This should have been pre-installed  by your computer retailer. . Good for Win 95 through to XP . Download below.  It is a self-extracting program. . Size - 1.4 megabytes . . Save to a temporary file then double click on  .'javaruntime.exe' to install. You need to stay connected to the Internet during installation. . Close this window when you are done. .