Windows 98 Second Edition Features and Upgrades

Released in May 1999, Microsoft Windows 98 Second Edition (SE) was an interim update that turned an unstable, bug-prone operating system into one of the most reliable and widely used platforms of the late 1990s. While retaining the core user interface of the original Windows 98, the Second Edition addressed critical stability flaws, dramatically expanded hardware compatibility, and introduced transformative networking capabilities that shaped modern home networks.

Internet Connection Sharing (ICS)

The flagship addition to Windows 98 SE was Internet Connection Sharing. Before ICS, sharing a single dial-up or early broadband connection across multiple home or small-office computers required expensive third-party proxy software or specialized routing hardware. ICS turned the host PC into a network address translation (NAT) gateway and DHCP server, allowing secondary computers on a local area network (LAN) to access the internet simultaneously through a single network line.

Dramatically Improved USB and Hardware Support

Although the original Windows 98 introduced universal serial bus (USB) support, it was notoriously unstable, often requiring system reboots or causing blue screens of death (BSODs). Windows 98 SE overhauled the USB driver stack, providing broad, stable, out-of-the-box support for USB keyboards, mice, storage drives, and printers. Additionally, SE significantly improved driver support for IEEE 1394 (FireWire) audio and video devices, making it a viable operating system for digital media editing.

Critical Stability and Bug Fixes

Windows 98 First Edition suffered from severe memory leaks and system instabilities. Most famously, a mathematical flaw in the operating system's timing routine caused systems to reliably crash after running continuously for 49.7 days. Windows 98 SE fixed this timer bug, overhauled system memory management, and bundled hundreds of minor patches and driver updates that resolved resource conflicts, resulting in substantially higher uptime and fewer general protection faults.

Updated Bundled Software Stack

Microsoft refreshed the software bundle within Windows 98 SE to match the expanding multimedia and web standards of 1999:

  • Internet Explorer 5.0: Replaced Internet Explorer 4.0, offering faster rendering, improved CSS standards support, and enhanced stability.
  • DirectX 6.1: Provided superior 3D hardware acceleration and DirectSound improvements for PC gaming.
  • Windows Media Player 6.2: Added support for newer digital audio and video formats, including MP3.
  • NetMeeting 3.0: Offered improved IP-based voice conferencing and application-sharing capabilities.

Modernized Networking Protocols

Beyond ICS, Windows 98 SE modernized the core networking stack. It introduced support for Wake-on-LAN (WoL), allowing computers to be powered on remotely via network commands. It also introduced compatibility with Asynchronous Transfer Mode (ATM) network cards and improved dial-up networking reliability, making it far more capable of handling transition technologies as users moved from dial-up to cable and DSL broadband.