|A version of the Windows 9x operating system|
|Source model||Closed source|
|Released to |
|May 15, 1998|
|June 25, 1998|
|Final release||Second Edition (4.10.2222 A) / May 5, 1999|
|Kernel type||Monolithic kernel (DOS)|
|Preceded by||Windows 95 (1995)|
|Succeeded by||Windows Me (2000)|
|Official website||Windows 98 at the Wayback Machine (archived October 12, 1999)|
|Mainstream support ended on June 30, 2002|
Extended support ended on July 11, 2006
Windows 98 is an operating system developed by Microsoft as part of its Windows 9x family of Microsoft Windows operating systems. It is the successor to Windows 95, and was released to manufacturing on May 15, 1998, and generally to retail on June 25, 1998. Like its predecessor, it is a hybrid 16-bit and 32-bit monolithic product with the boot stage based on MS-DOS.
Windows 98 is a heavily web-integrated operating system that bears numerous similarities to its predecessor and relies on the HTML language. Most of its improvements were cosmetic or designed to improve the user experience, but there were also a handful of features introduced to enhance system functionality and capabilities, including improved USB support and accessibility, as well as support for hardware advancements such as DVD players. Windows 98 was the first edition of Windows to adopt the Windows Driver Model, and introduced features that would become standard in future generations of Windows, such as Disk Cleanup, Windows Update, multi-monitor support, and Internet Connection Sharing.
Microsoft had marketed Windows 98 as a "tune-up" to Windows 95, rather than an entirely improved next generation of Windows. Upon release, it was generally well-received for its web-integrated interface and ease of use, as well as its addressing of issues present in Windows 95, although some pointed out that it was not significantly more stable than its predecessor. Windows 98 sold an estimated 58 million licenses, and saw one major update, known as Windows 98 Second Edition (SE), released on May 5, 1999. After the release of its successor Windows Me in 2000, mainstream support for Windows 98 and 98 SE ended on June 30, 2002, followed by extended support on July 11, 2006.
Following the success of Windows 95, development of Windows 98 began, initially under the development codename "Memphis." The first test version, Windows Memphis Developer Release, was released in January 1997.
Memphis first entered beta as Windows Memphis Beta 1, released on June 30, 1997. It was followed by Windows 98 Beta 2, which dropped the Memphis name and was released in July. Microsoft had planned a full release of Windows 98 for the first quarter of 1998, along with a Windows 98 upgrade pack for Windows 95, but it also had a similar upgrade for Windows 3.x operating systems planned for the second quarter. Stacey Breyfogle, a product manager for Microsoft, explained that the later release of the upgrade for Windows 3 was because the upgrade required more testing than that for Windows 95 due to the presence of more compatibility issues, and without user objections, Microsoft merged the two upgrade packs into one and set all of their release dates to the second quarter.
Near its completion, Windows 98 was released as Windows 98 Release Candidate on April 3, 1998, which expired on December 31. This coincided with a notable press demonstration at COMDEX that month. Microsoft CEO Bill Gates was highlighting the operating system's ease of use and enhanced support for Plug and Play (PnP). However, when presentation assistant Chris Capossela plugged a USB scanner in, the operating system crashed, displaying a Blue Screen of Death. Bill Gates remarked after derisive applause and cheering from the audience, "That must be why we're not shipping Windows 98 yet." Video footage of this event became a popular Internet phenomenon.
Microsoft had quietly marketed the operating system as a "tune-up" to Windows 95. It was compiled as Windows 98 on May 11, 1998, before being fully released to manufacturing on May 15. The company was facing pending legal action for allowing free downloads of, and planning to ship Windows licenses with, Internet Explorer 4.0 in an alleged effort to expand its software monopoly. Microsoft's critics believed the lawsuit would further delay Windows 98's public release; it did not, and the operating system was released on June 25, 1998.
A second major version of the operating system called Windows 98 Second Edition was later unveiled in March 1999. Microsoft compiled the final build on April 23, 1999, before publicly releasing it on May 5, 1999. Windows 98 was to be the final product in the Windows 9x line until Microsoft briefly revived the line to release Windows Me in 2000 as the final Windows 9x product.
New and updated features
Web integration and shell enhancements
The first release of Windows 98 included Internet Explorer 4.01. This was updated to 5.0 in the Second Edition. Besides Internet Explorer, many other Internet companion applications are included such as Outlook Express, Windows Address Book, FrontPage Express, Microsoft Chat, Personal Web Server and a Web Publishing Wizard, and NetShow. NetMeeting allows multiple users to hold conference calls and work with each other on a document.
The Windows 98 shell is web-integrated; it contains deskbands, Active Desktop, Channels, ability to minimize foreground windows by clicking their button on the taskbar, single-click launching, Back and Forward navigation buttons, favorites, and address bar in Windows Explorer, image thumbnails, folder infotips and Web view in folders, and folder customization through HTML-based templates. The taskbar supports customizable toolbars designed to speed up access to the Web or the user's desktop; these toolbars include an Address Bar and Quick Launch. With the Address Bar, the user accesses the Web by typing in a URL, and Quick Launch contains shortcuts or buttons that perform system functions such as switching between windows and the desktop with the Show Desktop button. Another feature of this new shell is that dialog boxes[clarification needed] show up in the Alt-Tab sequence.
Windows 98 also integrates shell enhancements, themes and other features from Microsoft Plus! for Windows 95 such as DriveSpace 3, Compression Agent, Dial-Up Networking Server, Dial-Up Scripting Tool and Task Scheduler. 3D Pinball Space Cadet is included on the CD-ROM, but not installed by default. Windows 98 had its own separately purchasable Plus! pack, called Plus! 98.
Title bars of windows and dialog boxes support two-color gradients, a feature ported from and refined from Microsoft Office 95. Windows menus and tooltips support slide animation. Windows Explorer in Windows 98, as in Windows 95, converts all-uppercase filenames to sentence case for readability purposes; however, it also provides an option Allow all uppercase names to display them in their original case. Windows Explorer includes support for compressed CAB files. The Quick Res and Telephony Location Manager Windows 95 PowerToys are integrated into the core operating system.
Improvements to hardware support
Windows Driver Model
Windows 98 was the first operating system to use the Windows Driver Model (WDM). This fact was not well publicized when Windows 98 was released, and most hardware producers continued to develop drivers for the older VxD driver standard, which Windows 98 supported for compatibility's sake. The WDM standard only achieved widespread adoption years later, mostly through Windows 2000 and Windows XP, as they were not compatible with the older VxD standard. With the Windows Driver Model, developers could write drivers that were compatible with other versions of Windows. Device driver access in WDM is actually implemented through a VxD device driver,
NTKERN.VXD, which implements several Windows NT-specific kernel support functions.
Support for WDM audio enables digital mixing, routing and processing of simultaneous audio streams and kernel streaming with high quality sample rate conversion on Windows 98. WDM Audio allows for software emulation of legacy hardware to support MS-DOS games, DirectSound support and MIDI wavetable synthesis. The Windows 95 11-device limitation for MIDI devices is eliminated. A Microsoft GS Wavetable Synthesizer licensed from Roland shipped with Windows 98 for WDM audio drivers. Windows 98 supports digital playback of audio CDs, and the Second Edition improves WDM audio support by adding DirectSound hardware mixing and DirectSound 3D hardware abstraction, DirectMusic kernel support, KMixer sample-rate conversion for capture streams and multichannel audio support. All audio is sampled by the Kernel Mixer to a fixed sampling rate which may result in some audio getting upsampled or downsampled and having a high latency, except when using Kernel Streaming or third-party audio paths like ASIO which allow unmixed audio streams and lower latency. Windows 98 also includes a WDM streaming class driver (Stream.sys) to address real time multimedia data stream processing requirements and a WDM kernel-mode video transport for enhanced video playback and capture.
Windows Driver Model also includes Broadcast Driver Architecture, the backbone for TV technologies support in Windows. WebTV for Windows utilized BDA to allow viewing television on the computer if a compatible TV tuner card is installed. TV listings could be updated from the Internet and WaveTop Data Broadcasting allowed extra data about broadcasts to be received via regular television signals using an antenna or cable, by embedding data streams into the vertical blanking interval portion of existing broadcast television signals.
Other device support improvements
Windows 98 had more robust USB support than Windows 95, which only had support in OEM versions OSR2.1 and later. Windows 98 supports USB hubs, USB scanners and imaging class devices. Windows 98 also introduced built-in support for some USB Human Interface Device class (USB HID) and PID class devices such as USB mice, keyboards, force feedback joysticks etc. including additional keyboard functions through a certain number of Consumer Page HID controls.
Windows 98 introduced ACPI 1.0 support which enabled Standby and Hibernate states. However, hibernation support was extremely limited, and vendor-specific. Hibernation was only available if compatible (PnP) hardware and BIOS are present, and the hardware manufacturer or OEM supplied compatible WDM drivers, non-VxD drivers. However, there are hibernation issues with the FAT32 file system, making hibernation problematic and unreliable.
Windows 98, in general, provides improved — and a broader range of — support for IDE and SCSI drives and drive controllers, floppy drive controllers and all other classes of hardware as compared to Windows 95. There is integrated Accelerated Graphics Port (AGP) support (although the USB Supplement to Windows 95 OSR2 and later releases of Windows 95 did have AGP support). Windows 98 has built-in DVD support and UDF 1.02 read support. The Still imaging architecture (STI) with TWAIN support was introduced for scanners and cameras and Image Color Management 2.0 for devices to perform color space transformations. Multiple monitor support allows using up to nine multiple monitors on a single PC, with the feature requiring one PCI graphics adapter per monitor. Windows 98 shipped with DirectX 5.2, which notably included DirectShow. Windows 98 Second Edition would later ship with DirectX 6.1.
Windows 98 networking enhancements to TCP/IP include built-in support for Winsock 2, SMB signing, a new IP Helper API, Automatic Private IP Addressing (also known as link-local addressing), IP multicasting, and performance enhancements for high-speed high bandwidth networks. Multihoming support with TCP/IP is improved and includes RIP listener support.
The DHCP client has been enhanced to include address assignment conflict detection and longer timeout intervals. NetBT configuration in the WINS client has been improved to continue persistently querying multiple WINS servers if it failed to establish the initial session until all of the WINS servers specified have been queried or a connection is established.
Network Driver Interface Specification 5 support means Windows 98 can support a wide range of network media, including Ethernet, Fiber Distributed Data Interface (FDDI), Token Ring, Asynchronous Transfer Mode (ATM), ISDN, wide area networks, X.25, and Frame Relay. Additional features include NDIS power management, support for quality of service, Windows Management Instrumentation (WMI) and support for a single INF file format across all Windows versions.
Windows 98 Dial-Up Networking supports PPTP tunneling, support for ISDN adapters, multilink support, and connection-time scripting to automate non-standard login connections. Multilink channel aggregation enables users to combine all available dial-up lines to achieve higher transfer speeds. PPP connection logs can show actual packets being passed and Windows 98 allows PPP logging per connection. The Dial-Up Networking improvements are also available in Windows 95 OSR2 and are downloadable for earlier Windows 95 releases.
For networked computers that have user profiles enabled, Windows 98 introduces Microsoft Family Logon which lists all users that have been configured for that computer, enabling users to simply select their names from a list rather than having to type them in.
Windows 98 supports IrDA 3.0 that specifies both Serial Infrared Devices and Fast Infrared devices, which are capable of sending and receiving data at 4 Mbit/s. Infrared Recipient, a new application for transferring files through an infrared connection is included. The IrDA stack in Windows 98 supports networking profiles over the IrCOMM kernel-mode driver. Windows 98 also has built-in support for browsing Distributed File System trees on Server Message Block shares such as Windows NT servers.
UPnP and NAT traversal APIs can be installed on Windows 98 by installing the Windows XP Network Setup Wizard. An L2TP/IPsec VPN client can also be downloaded. By installing Active Directory Client Extensions, Windows 98 can take advantage of several Windows 2000 Active Directory features.
Improvements to the system and built-in utilities
Windows 95 introduced the 32-bit, protected-mode cache driver VCACHE (replacing SMARTDrv) to cache the most recently accessed information from the hard drive in memory, divided into chunks. However, the cache parameters needed manual tuning as it degraded performance by consuming too much memory and not releasing it quickly enough, forcing paging to occur far too early. The Windows 98 VCACHE cache size management for disk and network access, CD-ROM access and paging is more dynamic compared to Windows 95, resulting in no tuning being required for cache parameters. On the FAT32 file system, Windows 98 has a performance feature called MapCache that can run applications from the disk cache itself if the code pages of executable files are aligned/mapped on 4K boundaries, instead of copying them to virtual memory. This results in more memory being available to run applications, and lesser usage of the swap file.
Windows 98 registry handling is more robust than Windows 95 to avoid corruption and there are several enhancements to eliminate limitations and improve registry performance. The Windows 95 registry key size limitation of 64 KB is gone. The registry uses less memory and has better caching.
Disk Defragmenter has been improved to rearrange program files that are frequently used to a hard disk region optimized for program start. The aggravating "Drive contents changed....restarting." message will still frequently appear in this version. If it gets stuck on the same area too many times, it will ask the user if it should keep trying or give up. However, the Disk Defragmenter from Windows Me does not have this problem and will function on Windows 98 if the user copies it over.
Windows 98 also supports a Fast Shutdown feature that initiates shutdown without uninitializing device drivers. However, this can cause Windows 98 to hang instead of shutting down the computer if a buggy driver is active, so Microsoft supplied instructions for disabling the feature. Windows 98 supports write-behind caching for removable disk drives. A utility for converting FAT16 partitions to FAT32 without formatting the partition is also included.
Other system tools
A number of improvements are made to various other system tools and accessories in Windows 98. Microsoft Backup supports differential backup and SCSI tape devices in Windows 98. Disk Cleanup, a new tool, enables users to clear their disks of unnecessary files. Cleanup locations are extensible through Disk Cleanup handlers. Disk Cleanup can be automated for regular silent cleanups.
Scanreg (DOS) and ScanRegW are Registry Checker tools used to back up, restore or optimize the Windows registry. ScanRegW tests the registry's integrity and saves a backup copy each time Windows successfully boots. The maximum number of copies could be customized by the user through "scanreg.ini" file. The restoration of a registry that causes Windows to fail to boot can only be done from DOS mode using ScanReg.
System Configuration Utility is a new system utility used to disable programs and services that are not required to run the computer. A Maintenance Wizard is included that schedules and automates ScanDisk, Disk Defragmenter and Disk Cleanup. Windows Script Host, with VBScript and JScript engines is built-in and upgradeable to version 5.6. System File Checker checks installed versions of system files to ensure they were the same version as the one installed with Windows 98 or newer. Corrupt or older versions are replaced by the correct versions. This tool was introduced to resolve the DLL hell issue and was replaced in Windows Me by System File Protection.
Windows 98 Setup simplifies installation, reducing the bulk of user input required. The Windows 98 Startup Disk contains generic, real-mode ATAPI and SCSI CD-ROM drivers that can be used instead in the event that the specific driver for a CD-ROM is unavailable.
Windows 98 includes an improved version of the Dr. Watson utility that collects and lists comprehensive information such as running tasks, startup programs with their command line switches, system patches, kernel driver, user drivers, DOS drivers and 16-bit modules. With Dr. Watson loaded in the system tray, whenever a software fault occurs (general protection fault, hang, etc.), Dr. Watson will intercept it and indicate what software crashed and its cause.
Windows Report Tool takes a snapshot of system configuration and lets users submit a manual problem report along with system information to technicians. It has e-mail confirmation for submitted reports.
Windows 98 includes Microsoft Magnifier, Accessibility Wizard and Microsoft Active Accessibility 1.1 API (upgradeable to MSAA 2.0.) A new HTML Help system with 15 Troubleshooting Wizards was introduced to replace WinHelp.
Users can configure the font in Notepad. Microsoft Paint supports GIF transparency. HyperTerminal supports a TCP/IP connection method, which allows it to be used as a Telnet client. Imaging for Windows is updated. System Monitor—used to track the performance of hardware and software—supports output to a log file.
- Telephony API (TAPI) 2.1
- DCOM version 1.2
- Ability to list fonts by similarity determined using PANOSE information.
- Tools to automate setup, such as Batch 98 and INFInst.exe, support error-checking, gathering information automatically to create an INF file directly from a machine's registry, customizing IE4, shell and desktop settings and adding custom drivers.
- Several other Resource Kit tools are included on the Windows 98 CD.
- Windows 98 has new system event sounds for low battery alarm and critical battery alarm. The new startup sound for Windows 98 was composed by Microsoft sound engineer Ken Kato, who considered it to be a "tough act to follow".
- Windows 98 shipped with Flash Player and Shockwave Player preinstalled.
Windows 98 Second Edition 
Windows 98 Second Edition (often shortened to Windows 98 SE and sometimes to Win98 SE) is an updated version of Windows 98, released on May 5, 1999, nine months before the release of Windows 2000. It includes many bug fixes, improved WDM audio and modem support, improved USB support, the replacement of Internet Explorer 4.0 with Internet Explorer 5.0, Web Folders (WebDAV namespace extension for Windows Explorer), and related shell updates. Also included is basic OHCI-compliant FireWire DV camcorder support (MSDV class driver) and SBP-2 support for mass storage class devices. Wake-On-LAN reenables suspended networked computers due to network activity, and Internet Connection Sharing allows multiple networked client computers to share an Internet connection via a single host computer.
Other features in the update include DirectX 6.1 which introduced major improvements to DirectSound and the introduction of DirectMusic, improvements to Asynchronous Transfer Mode support (IP/ATM, PPP/ATM and WinSock 2/ATM support), Windows Media Player 6.1 replacing the older Media Player, Microsoft NetMeeting 3.0, MDAC 2.1 and WMI. A memory overflow issue was resolved which in the older version of Windows 98 would crash most systems if left running for 49.7 days (equal to 232 milliseconds). Windows 98 SE could be obtained as retail upgrade and full version packages, as well as OEM and a Second Edition Updates Disc for existing Windows 98 users. USB audio device class support is present from Windows 98 SE onwards. Windows 98 Second Edition improved WDM support in general for all devices, and it introduced support for WDM for modems (and therefore USB modems and virtual COM ports), Microsoft driver support for both USB printers, and for USB mass-storage device class is not available for Windows 98.
Windows 98 Second Edition did not ship with the WinG API or RealPlayer 4.0, unlike the original release of Windows 98, due to both of these having been superseded by DirectX and Windows Media Player, respectively.
Several components of both Windows 98 and Windows 98 Second Edition can be updated to newer versions. These include:
- Internet Explorer 6 SP1 and Outlook Express 6 SP1
- Windows Media Format Runtime and Windows Media Player 9 Series on Windows 98 Second Edition (and Windows Media Player 7.1 on Windows 98 original release.)
- Windows Media Encoder 7.1 and Windows Media 8 Encoding Utility
- DirectX 9.0c (the latest compatible runtime is from October 2007.)
- MSN Messenger 7.0
- Significant features from newer Microsoft operating systems can be installed on Windows 98. Chief among them are .NET Framework versions 1.0, 1.1 and 2.0, the Visual C++ 2005 runtime, Windows Installer 2.0, the GDI+ redistributable library, Remote Desktop Connection client 5.2 and the Text Services Framework.
- Several other components such as MSXML 3.0 SP7, Microsoft Agent 2.0, NetMeeting 3.01, MSAA 2.0, ActiveSync 3.8, WSH 5.6, Microsoft Data Access Components 2.81 SP1, WMI 1.5 and Speech API 4.0.
- Office XP is the last version of Microsoft Office that is compatible with Windows 98.
- Although Windows 98 does not fully support Unicode, certain Unicode applications can run if the Microsoft Layer for Unicode is installed.
The two major versions of Windows 98 have minimum requirements needed to be run.
|Windows 98||Second Edition|
|Processor||Intel 80486 66 MHz or higher||Pentium processor recommended|
|RAM||16 MB||24 MB||24 MB recommended; it is possible to run on 8 MB machines with /nm option used during the installation process|
||The amount of space required depends on the installation method and the components selected, but virtual memory and system utilities as well as drivers should be taken into consideration.|
|Display||VGA or higher resolution monitor (640×480)|
|Media drive||CD-ROM or DVD-ROM drive||Floppy install is possible but slow|
|Input||Microsoft Mouse or compatible pointing device|
Windows 98 is only designed to handle up to 1 GB of RAM without changes. Both Windows 98 and Windows 98 Second Edition have problems running on hard drives of capacities larger than 32 GB in systems with certain Phoenix BIOS configurations. A software update fixed this shortcoming. In addition, until Windows XP with Service Pack 1, Windows was unable to handle hard drives that are over 137 GB in size with the default drivers, because of missing 48-bit Logical Block Addressing support.
Support for Windows 98 under Microsoft's consumer product life cycle policy was planned to end on June 30, 2003, however, in December 2002, Microsoft extended the support window to January 16, 2004. This date would then be extended again on January 13, 2004 to a final end of support date of July 11, 2006, citing support volumes in emerging markets as the reason for the extension.
Windows 98 retail availability ended as planned on June 30, 2002, and later became completely unavailable from Microsoft (through MSDN or otherwise) in any form due to the terms of Java-related settlements Microsoft made with Sun Microsystems.
The Windows Update website continued to be available after Windows 98's end of support date, however, during 2011, Microsoft retired the Windows Update v4 website and removed the updates for Windows 98 and Windows 98SE from its servers.
Windows 98 was released to generally favorable reviews, with praise directed to its improved graphical user interface and customizability, ease of use,: 30–31  and the degree to which it addressed complaints that users and critics had with Windows 95. Michael Sweet of Smart Computing characterized it as heavily integrating features of the Internet browser, and found file and folder navigation easier.: 30–31 Ed Bott of PC Computing lauded the bug fixes, easier troubleshooting, and support for hardware advances such as DVD players and USB. However, he also found that the operating system crashed only slightly less frequently, and criticized the high upgrade price and system requirements. He rated it four stars out of five.
Windows 98 sold 530,000 licenses in its first four days of availability, overtaking Windows 95's 510,000. It later sold a total of 580,000 and 350,000 licenses in the first and second months of availability, respectively.
In the first year of its release, Windows 98 sold a total of 15 million licenses – 2 million more than its predecessor. However, International Data Corporation estimated that of the roughly 89 million shipped computers in the desktop market, the operating system had a market share of 17.2 percent, compared to Windows 95's 57.4 percent. Meanwhile, the two operating systems continued to observe a trend whereby Windows 98 improved in sales performance, whereas Windows 95 dwindled. After a legal dispute and subsequent settlement with Sun Microsystems over the former's Java Virtual Machine, Microsoft ceased distributing the operating system on December 15, 2003, and IDC estimated that a total of 58 million copies were installed worldwide by then.
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