version> For example, if you are downloading the installer for update 1.6.0_01, the following file name: jre-1_6_0_version>-windows-i586.exe This key contains the following string value which is set to the major.minor version of the installed Java SE Runtime Environment: Note that CurrentVersion is set only if the version being installed is the highest version number on the machine. Trying to install the Java SE Runtime Environment on a non-supported version of Microsoft Windows or on a machine that doesn't have a sufficiently up-to-date Service Pack.