Regarding your java install issue in Vista, it looks like you might be able to uninstall a specific Windows update to get it to install: -vista/how-to-fix-error-code1603-java-install-windows-vista/13881.html
Regarding your java install issue in Vista, it looks like you might be able to uninstall a specific Windows update to get it to install: -vista/how-to-fix-error-code1603-java-install-windows-vista/13881.html