Introduction to windows 95




















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A Book by Peter Norton. A Book by Edward G. Martin,Andrew Martin. When the graphical user interface was started, the virtual machine manager took over the filesystem-related and disk-related functionality from MS-DOS, which itself was demoted to a compatibility layer for bit device drivers.

Windows 95 is capable of using all bit Windows 3. Using DOS applications in Windows 95 was much like 3. SYS have no effect on Windows applications. Most DOS games can run from within Windows 95, while 3.

Protected mode DOS programs were also runnable as Windows 95 provides p-mode emulation these cannot be used in Windows 3. As with Windows 3. Straight DOS mode works just like in all previous versions; there is no bit support and DOS drivers must be loaded for mice and other hardware.

When starting an application, even a native bit Windows application, MS-DOS would momentarily execute to create a data structure the program segment prefix and it was even theoretically possible for MS-DOS to run out of conventional memory while doing so, preventing the application from launching. Windows 3. And since the segments were allocated as FIXED, Windows could not move them, which would prevent any more applications from launching.

This was fixed in Windows Some basic elements of the user interface introduced in Windows 95 — such as the desktop metaphor with the taskbar at the bottom, the Start button, and the Windows Explorer file manager — remain fundamentally unchanged in later versions of Windows years later. The desktop includes shortcuts to launch programs and files, while the taskbar shows buttons for applications that are running. The Start Menu also has shortcuts for various tasks, as well as applications that are sorted into folders.

This remained the default layout until Windows XP. The word "Start" was dropped from the button in Windows Vista , the button being labeled with the Windows logo "Start" is still present as a tooltip and in the classic GUI mode. The flyout menu style was eventually replaced by a redesigned predominantly search-based application launcher, but the ability to browse all installed programs from Start has been retained in newer versions of Windows, such as Windows 7 and Windows 8.

When released for Windows 95, Internet Explorer 4. That update gave Windows 95 and Windows NT 4. Windows 95 included support for character mixed-case long filenames and preemptively multitasked pseudo-protected-mode bit applications. It was the first consumer version of Windows to be its own operating system instead of a shell that rode over top of DOS. It is available to both Windows programs and MS-DOS programs started from Windows they have to be adapted slightly, since accessing long file names requires using larger pathname buffers and hence different system calls.

Competing DOS-compatible operating systems released before Windows 95 cannot see these names. Using older versions of DOS utilities to manipulate files means that the long names are not visible and are lost if files are moved or renamed, as well as by the copy but not the original , if the file is copied. During a Windows 95 automatic upgrade of an older Windows 3. When Windows 95 is started in DOS mode, e.

In case the need arises to depend on disk utilities that do not recognize long file names, such as MS-DOS 6. Windows 95 followed Windows for Workgroups 3. While the OS kernel is bit, much code especially for the user interface remained bit for performance reasons as well as development time constraints much of W95's UI code was recycled from Windows 3. This had a rather detrimental effect on system stability and led to frequent application crashes. The introduction of bit File Access in Windows for Workgroups 3.

DOS can be used for running old-style drivers for compatibility, but Microsoft discourages using them, as this prevents proper multitasking and impairs system stability. Control Panel allows a user to see what MS-DOS components are used by the system; optimal performance is achieved when they are bypassed. The Windows kernel uses MS-DOS style real-mode drivers in Safe Mode , which exists to allow a user to fix problems relating to loading native, protected-mode drivers.

At the release date of Windows 95, Internet Explorer 1. The Plus! Pack did not reach as many retail consumers as the operating system itself it was mainly advertised for its add-ons such as themes and better disk compression but was usually included in pre-installed OEM sales, and at the time of Windows 95 release, the web was being browsed mainly with a variety of early web browsers such as Netscape promoted by products such as Internet in a Box.

While there was no uninstaller, it could be deleted easily if the user so desired. Only the 4. Windows 95 shipped with Microsoft's own dial-up online service called The Microsoft Network. A number of different editions of Windows 95 have been released.

Only the original release was sold as a shrink-wrapped product, later editions were provided only to computer original equipment manufacturers OEMs for installation on new PCs. Together with the introduction of Windows 95, Microsoft released the Microsoft Plus! Microsoft initially indicated to make updates available to Windows 95 every 6 months in the form of service packs.

The growing availability of Internet access meant that Windows updates could now be downloaded from Microsoft directly. The first service pack was made available half a year after the original release and fixed a number of small bugs.

The second service pack mainly introduced support for new hardware. This release was never made available to end-users directly and was only sold through OEMs with the purchase of a new PC. A full third service pack was never released, but two smaller updates to the second were released in the form of a USB Supplement OSR 2.

Both were available as stand-alone updates and as updated disc images shipped by OEMs.



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