In which year did Microsoft release Windows 98?

Microsoft released Windows 98 in 1998. The consumer operating system was released to manufacturing in May and became generally available at retail on June 25, 1998.

Windows 98 followed Windows 95 and was developed under the codename Memphis. It focused on better hardware support and web-integrated features rather than being a complete architectural break from its predecessor. Improvements included stronger USB support, multi-monitor support, Windows Update, Disk Cleanup, and support for larger FAT32 disk partitions.

The name can cause confusion because Windows 98 received a major follow-up edition in 1999. Windows 98 Second Edition added improvements such as Internet Connection Sharing and enhanced hardware support, but it was an update to the 1998 operating system, not the original release year.