We don't officially support Windows 3.1 or Windows 95. Because Java 1.4.1 needs to be supported by your operating system, we recommend using at a minimum Windows 98 (1st or 2nd edition), or better still any more recent operating system for better performance, such as Windows NT 4.0 with Service Pack 5 or later, Windows ME, Windows XP, Windows 2000 with Service Pack 2 or later.