Definition: WIN9598 was a Windows operating system for Microsoft's Windows 95/98, introduced in 1994. It replaced Win32 as the primary desktop operating system in many markets. The term "WIN9598" is commonly used to refer to a version of Windows 95/98 that was initially released by Microsoft and later changed from its original name. This newer version of Windows offered enhanced support for new technologies, including networked applications, which had not been available on the original OS.