Download Portable Java 7 Update 79 32-64 bit Online (0.5 MB)
Download Portable Java 7 32-64 bit Setup Extractor (0.5 MB)
Accept License Agreement then download jre-7u80-windows-i586.exe and/or jre-7u80-windows-x64.exe in same folder as extractor. In first screen enter 80. Setup extractor backup previous version by renaming folders.
Extract in your PortableApps folder (CommonFiles and *Portable folders at the same level).