Microsoft Corporation is an American multinational tech company that is the leading developer of personal computer software system presents to date, founded by Bill Gates and Paul G.Allen on April 4, 1975 AD. Its headquarters is in Redmond, Washington.
Evolution of Windows Operating System
1) MS-DOS ( 1981 )
MS-DOS was a non-graphical, command-line operating system originally developed by Microsoft for IBM-compatible personal computers. Microsoft has purchased QDOS (Quick and Dirty Operating System ) from Seattle Computer Products, renamed it as MS-DOS 1.0, and offered it to IBM as their new personal computer. From 1981 to 1997, a different version of MS-DOS was developed and on each update, some new feature was integrated to meet the demands of its users and professional programmers alike. Some of the versions of MS-DOS are as follows: MS-DOS 1.0, MS-DOS 1.11, MS-DOS 1.14, MS-DOS 1.25, MS-DOS 2.0, MS-DOS 3.0, MS-DOS 4.0, and many more.
2) Windows 1.0 (1985)
Windows 1.0 was the first graphical OS of Microsoft, which was released on November 20, 1985. It was a 16- bit multi-tasking shell that runs on top of the existing MS-DOS installation, so we can say this OS is not a standalone Operating System. Some of the popular Windows Applications at that time are Windows Paint, Windows Write, Notepad, Card File, Calculator, Clock. Microsoft provides the longest supported out of all versions of Windows to Windows 1.0 for 16 years, till December 31, 2001. This version was later succeeded by Windows 2.x
|System Requirement||192 KB RAM, 256 KB Hard Disk|
3) Windows 2.0 ( 1987 )
Windows 2.0 is a 16-bit GUI-based OS released on December 9, 1987. Windows 2.0 allowed users to control screen layout and application windows to overlap over one another( in Windows 1.0 only tiled windows is supported). It used icons to represent programs and files. I had several improvements in the user interface and memory management then preceded one. Windows 2.0 supported the VGA display system, which allowed you to use 16 colours at 640x480 resolution. It also introduced more sophisticated keyboard-shortcuts like Alt+Esc and the terminology of "Minimize" and "Maximize".It is the last version of Windows that doesn't require a hard disk.
Some application in windows 2.0 are: Calculator(calc.exe) , Calendar (calendar.exe) , Clipboard( clipbrd.exe), Clock (clock.exe) ,a computer game of reversi, Spooler, terminal,write, program information file editor (pifedit.exe) , control panel (control.exe), Raster graphic editor (paint.exe).
Succeeded by: Windows 2.1x (1998)
Windows 2.1x supported the Windows/286 processor, but to keep updated over time, Windows 2.1x developed windows/386 processor to support the new 386 processor. Note: Windows/386 could run multiple DOS applications simultaneously in the extended memory that Windows/286 can't do. Windows/386 is much more advanced. It introduced a protected mode kernel(ie . It allows system software to use features such as virtual memory, paging, and safe multi-tasking designed to increase an operating system's control over application software), above which the GUI and applications run as a virtual 8086 mode task. It allows several MS-DOS programs to run in parallel in "virtual 8086" CPU mode, rather than always suspending background applications.
4) Windows 3.0
Windows 3.0 is also a graphical version of windows and considered as a third major released version at that time. It was released on May 22, 1990. From a commercial point of view, this os is the first success for Microsoft. Critical Windows operation is now re-written in Assembly which makes this OS even faster and lighter than the previous OS. This OS also has introduced two main features, are VGA and virtual memory system which adds flexibility in the system.
|System Requirement||512 KB RAM, 7 MB Hard Disk|
5) Windows 3.1
It was released on April 6, 1992 AD with the following features which is not present in the previous Windows version. It can operate in a 16-bit environment.
|Min. Hardware Requirement||1 MB RAM, 16 MB Hard Disk|
Some of the features are :
1) True Type font support: This type of font offered various font developers a high degree of control in a precise way of how their fonts are displayed and also at what size sizes font to display.
2) Drop Real Mode Support: Real mode support which is present in the previous version of windows was removed because real mode does not support memory protection, multitasking, and code privilege levels.
3)Windows Registry: Windows 3.1 also introduced Windows Registry, which is a centralized database of settings, information, and values for software and hardware installed on windows os.
4)Can run the program via command prompt
5)Windows 3.1 can access theoretically 4 GB memory in 386 Enhanced Mode where the previous version can just up to 16MB maximum memory.
6) Windows 95
Windows 95 is a successor of Windows 3.1x. It was the first operating system in the 9x family and was released in August 1995. It is a 32 bit self-contained OS.
|Min. Hardware Requirement||4 MB RAM, 50 MB Hard Disk|
Some of the important features of Windows 95 are:
- Windows 95 allows us to write the name of the file with 255 characters along with mixed cases (upper and lower case both).
- Windows 95 allows preemptively multitasked protected-mode 32 bit and MS-DOS-based applications. So, it can run multiple programs at once. Not only this, it can run both 16 and 32-bit
application at once.
- Windows Internet Explorer or Microsoft Internet Explorer was included as a part of Windows 1995.
- Introduction of Taskbar and Start Button.
- "plug and play" hardware compatibility has added for both portable and desktop systems. Just plug hardware into the system then Windows 95 will automatically install proper hardware for it. It can run the old software of Windows 3.1x as well.
- Expanded memory limitation.
- Provides power management support ie. APM (Advance power management) support for a laptop computer.
- Support for server-based validation of the login process.
- Property sheets replace PIF(Program Information Files which is an executable file) files(previously used in Windows 3.1) in Windows 95
- Other miscellaneous abilities added in Windows 95 are built-in dial-up networking for the Internet, improved sound and video performance,super-fast video performance features added and the new Microsoft Exchange electronic communication abilities are added.
7) Windows 98
Windows 98 is a successor of Windows 98. It was the one operating system in the 9x family and was released on June 25, 1998, on market. Blue Screen Of Death, a famous fatal error seems to be first in Windows 98. It often led to users rebooting on their system and losing an unsaved job.
|System Requirement||16 MB RAM, 500 MB Hard Disk|
Some Improvement and Features of Windows 98 are:
- It is better than Windows 95. Windows98 supports more than 1900 current hardware systems internally and has passed the compatibility test with over 3500 common software.
- Windows98 offers new tools like Microsoft Magnifier, Accessibility Wizard, and Microsoft Active Accessibility
- Windows 98 has introduced a new HTML based help function with 15 problem-solving wizards.
- In Notepad, users can set the font.
- GIF transparency is supported by Microsoft Paint.
- A TCP / IP link technique is supported by HyperTerminal and can be used as a Telnet Client.
- Windows 98 is more robust than Windows 95 in registry handling to prevent corruption and several improvements are made to remove constraints and enhance registration efficiency.
- All parts of making the desktop a dial-up Server were included in Windows98.
- Windows98 is supporting built-in Power Interface and Advanced Configuration ports to enable or disable your PC.
and many more
Windows NT's first version was Windows NT 3.1 and was made for workstations and server pcs and it was released on July 27, 1993 AD. The operating system was supplied with both Windows NT Workstation and Windows NT Server versions in two editions. Windows NT Workstation, which is simply called Windows NT, has been intended to serve as a client workstation, while Windows NT is a network server.
The following are 4 variants of Windows NT:
- Windows NT 3.1 (July 1993) – Workstation, Advanced server
- Windows NT 3.5 (September 1994) - Workstation, Server
- Windows NT 3.51 (May 1995) - Workstation, Server
- Windows NT 4.0 (July 1996) - Workstation, Server, Server Enterprise Edition, Terminal Server, Embedded
Some of the renowned features of Windows NT are:
a) Windows NT family has launched a default NTFS file system that improves disk performance, automatically recovers from disk flaws, supports large-sized hard disk drive, proper disk space utilization provides protection by authorizing and encrypting the data, etc.
b) It is a multi-user and processor-independent operating system.
c) Windows NT supports preemptive multi-tasking features to share the operating system and hardware resources across all computer programs.
d) It supports a number of hardware systems like RISC(Reduced Instruction Set Computer) system like PowerPC Processor, Alpha AXP, MIPS R4x00, and CISC(Complex Instruction Set Computing) system like a Pentium based system of Intel.
9) Windows 2000
After a different version of Windows NT, Windows 2000 was released.It was released on Febrary 17, 2000It is successor of Windows NT 4.0.
|System Requirement||32 MB RAM, 650 MB Hard Disk|
Windows ME is a short form of Windows Millennium Edition which was released on June 19, 2000, by Microsoft Corporation and it was the last OS for Windows 9x family. Microsoft has released Windows ME for the replacement of Windows 98.
|System Requirement||32 MB RAM, 320 MB Hard Disk|
Some of the important features added in Windows ME are:
- System Restore Tool: Help to restore the system to the previous stable state of Windows.
- Automatic Windows Update: It included a new function called "Windows Update" which downloads and installs Windows Update from Microsoft Windows Update website upgrades automatically.
- Windows Movie Maker: It allows users to capture and edit media contents.
- Windows Image Acquisition (WIA): It allows Windows Application to connect and communicate with devices such as digital cameras and webcams, etc.
- Enhanced and Improved Accessibility Features: Introduced mouse control panel with the IntelliPoint feature. It helps the cursor to hide when type and show when Ctrl is pressed.
Windows ME was one of the unstable Windows OS and soon introduced Windows XP.
It was released on October 25, 2001.
|System Requirement||64 MB RAM, 1.5 GB Hard Disk|
Some of the Top Features of Windows XP are:
- New Looking User Interface: The appearance of Windows XP is completely changed by using alpha compositing effects, drop shadows, and visual styles. Windows XP has added a modern subpixel rendering system called ClearType to enhance the appearance of fonts in LCDs.The Start Menu major overtake in XP for the first time at that time. And has now been updated to a two-column layout and can lists, pins, and shows regularly used applications, documents recently opened, and the standard "All Programs" cascade menu.
- WLAN Features: When XP is loaded, most of the wireless NICs are recognized automatically by XP. The system can automatically scan for available WLAN networks and list the networks it detects. This feature was introduced in Windows XP.
- Device Driver Rollback Features: Device Driver Rollback features were introduced in Windows XP, which allows you to return to an earlier version of the device driver when a newly installed driver has a problem.
- Device support improvement: Windows XP has introduced USB 2.0 supports for different devices like Bluetooth,USB video device class, Windows Media Player, and imaging.
- CD Burning: From Windows XP, users don't have to install additional software for burning files. Windows XP has these inbuilt features. It allows users to directly burn files to a compact disc through Windows Explorer.
- Client Firewall: Windows XP now has its own Internet Connection Firewall included networking features in all network interfaces. These firewalls are hugely useful for remote users who connect to the Internet because attackers can access a corporate network easily by detecting one of these potentially easy targets.
- Remote Desktop and Remote Assistance
Windows XP professional OS allows using remote desktop connection features so that a person sitting at home can access
another PC at any location remotely. Also, Remote Assistance service was introduced which helps to get advanced technical support if the end-user is running Windows XP professional.
A user goes straight to Start | Help | Remote support and then can contact a technician using the e-mail or Windows messaging.
Some Drawback of Windows XP
- Expensive to buy
- Bad Security
- Supports only up to 4 GB RAM so if you run Windows XP with a 6 GB RAM system then 2 GB RAM memory will not be used.
11) Windows Vista
Windows Vista was released in November 2006 and it was the successor of Windows XP. It seems to be more secure than XP. It has various security features like parental controls, advanced firewalls, encryption features, etc.
|System Requirement||512 MB RAM, 15 GB free Hard Disk space|
Some new features in Windows Vista
- Windows Aero: It was a new hardware-based graphical user interface. This new GUI includes a new glass transparencies theme, animations like Windows 3D Flip, Taskbar live thumbnail, which is meant to be cleaner and more esthetically appealing than those of prior Screens.
- Instant Search: There are instant search features in Windows Vista which let you finding files more quickly than the previous version.
- Windows Defender: Windows Defender was introduced in Vista. This helps you with security on your PC.
- Windows Mail: Windows Mail was the built-in email client which replaced outlook express. This program came with junk mail filtering and phishing filtering features to help keep users protected from unwanted messages.
- ReadyBoost Features: This feature was introduced with Windows Vista.It uses the memory of NAND memory mass storage devices like SD cards and USB flash drives,
which is used as a cache between an HDD and RAM and increases overall system performance.
The performance of ReadyBoost features depends on mass storage devices' capacity and speed.
- BitLocker DRIVE ENCRYPTION: It is security features introduced in Windows Vista. It helps to encrypt your disk drives and their contents. This prevents unauthorized access to the disk contents.
- Tablet Support: Windows Vista added Tablet PC support for Business, Enterprise, Ultimate, and Home Premium Editions.
- Windows Gadgets: It is a widget that runs on your desktop sidebar and was introduced in Windows Vista.eg. a clock, a calendar, a rotating photo display, notes, and an RSS feed area for headlines can be used as gadgets.
Drawbacks of Windows Vista: It required high memory to run the system of that time. Nothing less than 2GB of RAM worked. Also generally required high graphics card of that time.
It was released on July 22, 2009. Its styles and looks and the interface are somehow similar to Windows Vista.It is one of the most stable Windows OS.
|Min. Hardware Requirement||1GB RAM, 16GB free HDD Space|
Some of the general features in Windows 7 are as follows :
- Touch Screen and Sensor: Windows 7 Os is designed for touch screen interaction. According to Microsoft, if the devices support multi-touch then Windows 7 will able to produce a touch effect on the screen. Also, Windows 7 introduce native supports for different types of sensor some of them are: accelerometer sensors, GPS sensors, ambient light sensors.
- Fast Boot and Installation: Windows 7 boot much faster than the previous version. Also, installation times of Windows 7 are fast and the installation process may complete in around 30 minutes.
- Sticky Notes: Sticky Notes features are introduced in Windows 7.
- Power analysis and reporting: Windows 7 introduced very useful features for power analysis and reporting. You can use powercfg command.
It helps to produce an HTML report of the energy efficiency of a computer and shows device or settings information.
- HomeGroup Features: It is a new simple networking feature of Windows 7 which provides connect computers together on your home network to share images, music videos, documents, and printers.
- PowerShell: Powershell 1.x can be downloaded in earlier WIndows version like VIsta.But Powershell 2.0 comes within Windows 7, which is more flexible and powerful then 1.x
Windows 8 was released on August 1, 2012
Initial Cost: $119
Min Hardware Requirement: 1GB RAM, 16 GM RAM
Windows 8.1 was released on August 27, 2013
Initial Cost :$199
Min. Hardware Requirement: 1GB, 16GB hard drive
Windows 10 was released on July 15, 2015
Min System Requirement:512 MB RAM, 15 GB Harddrive