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Following is the Minimum System Requirements for the various versions of Window's operating systems.

Windows 9x

Windows NT

Windows 2K

Windows XP

Windows Vista

     Win95

        Win98

     WinME

    Workstation

         Server

    Professional

        Server

     Home

Professional

     Home Basic

Home Premium / Business / Ultimate

Computer/
Processor

Personal computer with a 386DX or higher processor (486 recommended)

A personal computer with a 486DX 66 megahertz (MHz) or faster processor (Pentium central processing unit recommended).

Pentium 150-MHz processor or better.

Pentium or faster processor

486/33 megahertz (MHz) or higher, or Pentium, or Pentium PRO processor.

133 MHz or higher Pentium-compatible CPU.

133 MHz or higher Pentium-compatible CPU.

Pentium 233 MHz processor or faster (300 MHz is recommended).

Pentium 233 MHz processor or faster (300 MHz is recommended).

Pentium 800 MHz processor

Minimum 1 G
Hz  32-bit (x86) or 64-bit (x64) is recommended
.
Pentium 800 MHz processor

Minimum 1 G
Hz  32-bit (x86) or 64-bit (x64) is recommended
.

CPU Support

Windows 95 supports only single CPU's.

Windows 98 supports only single CPU's.

Windows Millennium supports only single CPU's.

Windows NT Workstation supports only single CPU's.

The retail version of Windows NT Server 4.0 supports up to four microprocessors out of the box. Support for up to 32 processors is available from your hardware vendor.

Windows 2000 Professional supports single and dual CPU systems.

Windows 2000 Server supports up to four CPUs on one machine.

Windows XP Home supports only single CPU's.

Windows XP Professional supports single or dual CPU systems.

Supports multiple core CPU's but only 1 processor Home Premium supports multiple core CPU's but only 1 processor.

Vista Business, Enterprise and Ultimate support both multiple core CPU's and dual processors.

Memory

4 megabytes (MB) of memory (8 MB recommended)

16 megabytes (MB) of memory (24 MB recommended).

32 megabytes (MB) of RAM or better

16 megabytes (MB) of memory (RAM); 32 MB recommended

16 MB of RAM or higher.  32 MB of RAM or higher for Service Pack 4.

At least 64 megabytes (MB) of RAM; more memory generally improves responsiveness.

At least 128 megabytes (MB) of RAM. 256 MB recommended. 4 gigabytes (GB) maximum.

At least 64 megabytes (MB) of RAM (128 MB is recommended)

At least 64 megabytes (MB) of RAM (128 MB is recommended)

At least 512 megabytes (MB) of RAM

Note On system configurations that use system memory as graphics memory, at least 448 MB of system memory must be available to the operating system after some memory is allocated for graphics.

At least 512 megabytes (MB) of RAM (1 GB is required to run the Aero Interface)

Hard Disk

Typical hard disk space required to install Windows 95 on a clean system: 50-55 MB. Space required to upgrade to Windows 95: 35-40 MB. The actual requirement varies depending on the features you choose to install.

A full install of Windows 98 on a FAT32 drive requires 175 MB of free hard disk space, but may range from between 140 MB and 255 MB. A typical upgrade from Windows 95 requires approximately 195 MB of free hard disk space, but the hard disk space may range from between 120 MB and 295 MB, depending on your computer configuration and the options that you choose to install.

Minimum 320 MB of free hard-disk space

110 MB of available hard disk space

160 megabyte (MB) of available hard disk space minimum.

2 GB with 650 MB free space.

2 GB with 1 GB free space. Additional free hard disk space is required if you are installing over a network.

At least 1.5 gigabytes (GB) of available space on the hard disk

At least 1.5 gigabytes (GB) of available space on the hard disk

At least 20-gigabyte (GB) hard disk that has 15 GB of free hard disk space.

At least 40-gigabyte (GB) hard disk that has 15 GB of free hard disk space.

Drive

One 3.5-inch high-density floppy disk drive

One 3.5-inch high-density floppy disk drive.

3.5-inch high-density floppy disk drive and a CD-ROM or DVD-ROM drive

CD-ROM drive or access to a CD-ROM over a computer network

CD-ROM drive

CD-ROM or DVD drive.

CD-ROM or DVD drive.

CD-ROM or DVD-ROM drive

CD-ROM or DVD-ROM drive

Internal or external DVD-ROM drive

Internal or external DVD-ROM drive

Display

VGA or higher resolution (256-color SVGA recommended)

VGA or higher resolution (16-bit or 24-bit color SVGA recommended).

Video adapter and monitor that support VGA or higher resolution

VGA or higher-resolution display adapter

VGA, Super VGA, or video graphics adapter compatible with Windows NT Server4.0

VGA or higher resolution monitor.

VGA or higher resolution monitor.

Video adapter and monitor with Super VGA (800 x 600)or higher resolution

Video adapter and monitor with Super VGA (800 x 600) or higher resolution

Video adapter and monitor with Super VGA (800 x 600)or higher resolution with support for DirectX9 and 32MB of graphics memory.

Video adapter and monitor with Super VGA (800 x 600) or higher resolution with support for DirectX 9; WDDM Driver; 128MB of graphics memory; Pixel Shader 2.0; 32 bits per pixel

Keyboard/ Mouse

Keyboard required.  Mouse or compatible pointing device recommended.

Keyboard required.  Mouse or compatible pointing device recommended.

Keyboard, Mouse or compatible pointing device required.

Microsoft Mouse or compatible pointing device

 

Keyboard required.  Mouse or compatible pointing device recommended.

Keyboard required.  Mouse or compatible pointing device recommended.

Keyboard and a Microsoft Mouse or some other compatible pointing device

Keyboard and a Microsoft Mouse or some other compatible pointing device

Keyboard and a Microsoft Mouse or some other compatible pointing device

Keyboard and a Microsoft Mouse or some other compatible pointing device

Sound

 

 

Audio card and speakers for sound

 

 

 

 

Sound card and Speakers or headphones

Sound card and Speakers or headphones

Sound card and Speakers or headphones

Sound card and Speakers or headphones

Optional

Modem or fax/modem

Network adapter

Audio card and speakers for sound

Scanner or digital camera  

14.4mbs Modem. 28.8 or faster recommended

Network adapter  

DVD-ROM drive and decoder adapter  

Audio card and speakers for sound

Scanner or digital camera

Second monitor and second video adapter

IEEE 1394 bus (FireWire)  

Universal Serial Bus (USB) bus and HID hardware  

ATI All-in-Wonder graphics card

 

 

 

 

 

 

 

Internet access (fees may apply) 

Internet access (fees may apply)

 

 

 

 

 

 

 

     

Windows 9x

Windows NT

Windows 2K

Windows XP

Windows Vista

      Win95

      Win98

       WinME

     Workstation

      Server

       Professional

       Server

     Home

Professional

     Home Basic

Home Premium / Business / Ultimate

Other Info

Also supports RISC-Based Systems.

Also supports RISC-Based Systems.

Networking options (Microsoft Windows NT Server 4.0 works with the following)

Microsoft LAN Manager

Microsoft Windows for Workgroups operating system

AppleTalk

DECPATHWORKS

IBMLAN Server

IBMSNA networks

The Internet

NFSnetworks

Novell NetWare

Remote Access Services by way of ISDN, X.25, and standard phone lines

TCP/IP networks

Clients supported

Windows 3.x operating system

Windows for Workgroups

Windows 95 operating system

Windows 98 operating system

Windows NT Workstation

Apple Macintosh

MS-DOS® operating system

OS/2

UNIX (Requires ODBC [OpenDatabase Connectivity] client software from Visigenic Software, San Mateo, California.)

 

For Internet access:

Some Internet functionality may require Internet access, a Microsoft. NET Passport account, and payment of a separate fee to a service provider; local and/or long-distance telephone toll charges may apply

14.4 Kbps or higher-speed modem

For networking:

Network adapter appropriate for the type of local-area, wide-area, wireless, or home network you wish to connect to, and access to an appropriate network infrastructure; access to third-party networks may require additional charges

For instant messaging, voice and video conferencing, and application sharing, both parties need:

Microsoft .NET Passport account and Internet access

For voice and video conferencing, both parties also need:

33.6 Kbps or higher-speed modem, or a network connection

Microphone and sound card with speakers or headset

For video conferencing, both parties also need:

Video conferencing camera

Windows XP

For application sharing, both parties also need:

33.6 Kbps or higher-speed modem, or a network connection

Windows XP

For remote assistance:

Both parties must be running Windows XP and be connected by a network

For sound:

Sound card and speakers or headphones

For DVD video playback:

DVD drive and DVD decoder card or DVD decoder software

8 MB of video RAM

For Windows Movie Maker:

Video capture feature requires appropriate digital or analog video capture device

400-MHz or higher processor for digital video camera capture

For Internet access:

Some Internet functionality may require Internet access, a Microsoft .NET Passport account, and payment of a separate fee to a service provider; local and/or long-distance telephone toll charges may apply

14.4 Kbps or higher-speed modem

For networking:

Network adapter appropriate for the type of local-area, wide-area, wireless, or home network you wish to connect to, and access to an appropriate network infrastructure; access to third-party networks may require additional charges

For instant messaging, voice and video conferencing, and application sharing, both parties need:

Microsoft .NET Passport account and Internet access or Microsoft Exchange 2000 Server instant messaging account and network access (some configurations may require download of additional components)

For voice and videoconferencing, both parties also need:

33.6 Kbps or higher-speed modem, or a network connection

Microphone and sound card with speakers or headset

For videoconferencing, both parties also need:

Video conferencing camera

Windows XP

For application sharing, both parties also need:

33.6 Kbps or higher-speed modem, or a network connection

Windows XP

For remote assistance:

Both parties must be running Windows XP and be connected by a network

For remote desktop:

A Windows 95 or later–based computer, and the two machines must be connected by a network

For sound:

Sound card and speakers or headphones

For DVD video playback:

DVD drive and DVD decoder card or DVD decoder software

8 MB of video RAM

For Windows Movie Maker:

Video capture feature requires appropriate digital or analog video capture device

400 MHz or higher processor for digital video camera capture

Additional requirements
Actual requirements and product functionality may vary based on your system configuration. Windows Vista Upgrade Advisor can help you determine which features and edition of Windows Vista will run on your computer.
While all editions of Windows Vista can support multiple core CPUs, only Windows Vista Business, Ultimate, and Enterprise can support dual processors.

 

Additional requirements

Actual requirements and product functionality may vary based on your system configuration. Windows Vista Upgrade Advisor can help you determine which features and edition of Windows Vista will run on your computer.

While all editions of Windows Vista can support multiple core CPUs, only Windows Vista Business, Ultimate, and Enterprise can support dual processors.

Home Premium / Ultimate

TV tuner card required for TV functionality (compatible remote control optional).

Home Premium / Business / Ultimate

Windows Tablet and Touch Technology requires a Tablet PC or a touch screen.

Ultimate

Windows BitLocker Drive Encryption requires a USB Flash Drive and a system with a TPM 1.2 chip.

 

 
  

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