The Microsoft Intellipoint 4.1 CD Disc Mouse Software is a driver update specifically designed for Windows operating systems. It is a CD format software that is compatible with English language settings. This product is ideal for those looking to update their mouse drivers to ensure optimal performance and compatibility with their Windows operating system. The Microsoft brand ensures quality and reliability, making this software a trusted option for users seeking to enhance their computer's functionality.  The envelope containing the disc is not sealed.