Microsoft Windows XP Professional x64 Edition released on April 25, 2005 by Microsoft is a variation of the Windows XP operating system for x86-64 personal computers. Itanium is the brand name for 64-bit Intel microprocessors that implement the Intel Itanium architecture (formerly called IA-64). ... This does not cite any references or sources. ... Image File history File links Microsoft_Windows_XP_Logo. ... A website (alternatively, Web site or web site) is a collection of Web pages, images, videos and other digital assets that is hosted on one or several Web server(s), usually accessible via the Internet, cell phone or a LAN. A Web page is a document, typically written in HTML... The term software company could be applied to: a) a company that produces software, distributes software from a third party, or provides services such as custom software development. ... For other uses, see Software developer (disambiguation). ... Microsoft Corporation, (NASDAQ: MSFT, HKSE: 4338) is a multinational computer technology corporation with global annual revenue of US$44. ... Windows NT (New Technology) is a family of operating systems produced by Microsoft, the first version of which was released in July 1993. ... Shared source is Microsoft’s framework for sharing computer program source code with individuals and organizations, which has been imitated by other companies such as RISC OS Open Limited. ... is the 115th day of the year (116th in leap years) in the Gregorian calendar. ... Year 2005 (MMV) was a common year starting on Saturday (link displays full calendar) of the Gregorian calendar. ... A kernel connects the application software to the hardware of a computer. ... Graphical overview of a hybrid kernel Hybrid kernel is a kernel architecture based on combining aspects of microkernel and monolithic kernel architectures used in computer operating systems. ... The user interface is the part of a system exposed to users. ... “GUI” redirects here. ... A software license is a legal agreement which may take the form of a proprietary or gratuitous license as well as a memorandum of contract between a producer and a user of computer software. ... x64 is Microsoft Corporations marketing designation for the Advanced Micro Devices AMD64 and Intel EM64T 64-bit Instruction Set Extensions to the x86 architecture, which were substantially similar as of 2004. ... is the 115th day of the year (116th in leap years) in the Gregorian calendar. ... Year 2005 (MMV) was a common year starting on Saturday (link displays full calendar) of the Gregorian calendar. ... Microsoft Corporation, (NASDAQ: MSFT, HKSE: 4338) is a multinational computer technology corporation with global annual revenue of US$44. ... Windows XP is a line of operating systems developed by Microsoft for use on general-purpose computer systems, including home and business desktops, notebook computers, and media centers. ... // An operating system (OS) is the software that manages the sharing of the resources of a computer. ... The AMD64 or x86-64 is a 64-bit processor architecture invented by AMD. It is a superset of the x86 architecture, which it natively supports. ...

Windows XP Professional x64 Edition is based upon Windows Server 2003 SP1 (build 5.2.3790.1830), as that was the latest version of Microsoft Windows during the operating system's development, but takes Windows XP as its name. It is designed to use the expanded 64-bit memory address space provided by the x86-64 architecture. Windows Server 2003 is a server operating system produced by Microsoft. ... Duke Nukem 3D was the most famous game that used the Build engine. ... “Windows” redirects here. ... Windows XP is a line of operating systems developed by Microsoft for use on general-purpose computer systems, including home and business desktops, notebook computers, and media centers. ... In computing, a 64-bit component is one in which data are processed or stored in 64-bit units (words). ... The AMD64 or x86-64 is a 64-bit processor architecture invented by AMD. It is a superset of the x86 architecture, which it natively supports. ...

The primary benefit of moving to 64-bit is the increase in the maximum allocatable system memory (RAM). Windows XP 32-bit is limited to a total of 4 GB, which is, by default, equally divided between Kernel and application usage. Using the /3GB switch in the boot.ini file forces Windows to limit the kernel to the upper 1GB and provides up to 3GB for applications. Windows XP x64 can support much more memory; although the theoretical memory limit a 64-bit computer can address is about 16 exabytes (16 billion gigabytes), Windows XP x64 is currently limited to 128 GB of physical memory and 16 TB of virtual memory. Microsoft claims this limit will be increased as hardware capabilities improve. In practice, most motherboards compatible with 64-bit processors do not support anywhere close to the maximum limit, and often retain the 4 GB limit, though motherboards capable of 8GB are becoming more common. This article does not cite any references or sources. ... Look up RAM, Ram, ram in Wiktionary, the free dictionary. ... This article is about the unit of measurement. ... An exabyte (derived from the SI prefix exa-) is a unit of information or computer storage equal to approximately one quintillion bytes. ... This article is about a measurement term for data storage capacity. ... How virtual memory maps to physical memory Virtual memory is an addressing scheme implemented in hardware and software that allows non-contiguous memory to be addressed as if it were contiguous. ... A motherboard is the central or primary circuit board making up a complex electronic system, such as a modern computer. ...

Windows XP Professional x64 Edition is not to be confused with Windows XP 64-bit Edition, as the latter was designed for Intel Itanium processors. ^[1][2], although they both are commonly referred to as '64-bit Windows' by Microsoft due to their similarities from developer's point of view. This does not cite any references or sources. ... Intel Corporation (NASDAQ: INTC, SEHK: 4335), founded in 1968 as Integrated Electronics Corporation, is an American multinational corporation that is best known for designing and manufacturing microprocessors and specialized integrated circuits. ... Itanium is the brand name for 64-bit Intel microprocessors that implement the Intel Itanium architecture (formerly called IA-64). ...

Both Windows 2003 x64 and XP x64 use identical kernels and codebase. This is evident when the System Information tool reports the current OS as Windows Server 2003 x64 and not Windows XP.

Compatibility with 32-bit applications

Windows XP Professional x64 Edition uses a technology named WOW64, which permits the execution of 32-bit x86 applications. It was first employed in Windows XP 64-bit Edition (for the Itanium), but then reused for the “x64 Editions” of Windows XP and Windows Server 2003. WoW64 (Windows-on-Windows 64-bit) is a subsystem of the Windows operating system that is capable of running 32-bit applications and is included on all 64-bit versions of Windows â€” including Windows XP 64-bit Editions, Windows Server 2003 x64 Edition and Windows Vista 64-bit Editions. ... x86 or 80x86 is the generic name of a microprocessor architecture first developed and manufactured by Intel. ... This does not cite any references or sources. ... Itanium is the brand name for 64-bit Intel microprocessors that implement the Intel Itanium architecture (formerly called IA-64). ...

Since the X86-64 architecture includes hardware-level support for 32-bit instructions, WOW64 simply switches the process between 32- and 64-bit modes. As a result, X86-64 architecture microprocessors suffer no performance loss when executing 32-bit Windows applications. On the Itanium architecture, WOW64 was required to translate 32-bit x86 instructions into their 64-bit Itanium equivalents—which in some cases were implemented in quite different ways—so that the processor could execute them. All 32-bit processes are shown with *32 in the task manager, while 64-bit processes have no extra text present. The AMD64 or x86-64 is a 64-bit processor architecture invented by AMD. It is a superset of the x86 architecture, which it natively supports. ... The AMD64 or x86-64 is a 64-bit processor architecture invented by AMD. It is a superset of the x86 architecture, which it natively supports. ... Itanium is the brand name for 64-bit Intel microprocessors that implement the Intel Itanium architecture (formerly called IA-64). ...

Although 32-bit applications can be run transparently, the mixing of the two types of code within the same process is not allowed. A 64-bit application cannot link against a 32-bit library (DLL) and similarly a 32-bit application cannot link against a 64-bit library. This may lead to the need for library developers to provide both 32- and 64-bit binary versions of their libraries. Windows XP x64 Edition includes both 32- and 64-bit versions of Internet Explorer, in order to allow for the possibility that some third-party browser plugins or ActiveX controls may not yet be available in 64-bit versions. Illustration of an application which may use libvorbisfile. ... Windows Internet Explorer (formerly Microsoft Internet Explorer abbreviated MSIE), commonly abbreviated to IE, is a series of proprietary graphical web browsers developed by Microsoft and included as part of the Microsoft Windows line of operating systems starting in 1995. ... ActiveX is Microsoft technology used for developing reusable object oriented software components. ...

Older 32-bit drivers and services are not supported by 64-bit Windows, but video and audio codecs such as XviD or OggDS (which are in fact 32-bit DLLs), are supported as long as the media player that uses them is 32-bit as well. A codec is a device or program capable of performing encoding and decoding on a digital data stream or signal. ... Xvid (formerly XviD) is a video codec library following the MPEG-4 standard. ... DLL is an abbreviation which can commonly mean: Data link layer, a layer in the OSI network architecture model Dynamically Linked Library, a binary application library file format in Microsoft Windows and IBM OS/2 (see the Dynamic linking section of the Library (computer science) article) Doubly Linked List, a...

The modding website xtremesystems.org users have compiled (and continuously update) a thread on their forums verifying games / applications that run on x64 here

Compatibility with other applications

Unlike prior versions of the Windows NT line, 64-bit Windows versions do not include NTVDM so there is no support for the execution of MS-DOS, POSIX, OS/2 1.x and 16-bit Windows applications, although there are 3rd-party software emulators such as DOSBox that can be used to run DOS programs. Windows NT (New Technology) is a family of operating systems produced by Microsoft, the first version of which was released in July 1993. ... Virtual DOS machine (VDM) is the name of Microsofts technologies allowing to run MS-DOS programs on Intel 80386 or higher computers when there is already another operating system running and controlling the hardware. ... Microsofts disk operating system, MS-DOS, was Microsofts implementation of DOS, which was the first popular operating system for the IBM PC, and until recently, was widely used on the PC compatible platform. ... POSIX or Portable Operating System Interface[1] is the collective name of a family of related standards specified by the IEEE to define the application programming interface (API) for software compatible with variants of the Unix operating system. ... To meet Wikipedias quality standards, this article or section may require cleanup. ... In computer science, 16-bit is an adjective used to describe integers that are at most two bytes wide, or to describe CPU architectures based on registers, address buses, or data buses of that size. ... An emulator reproducing a console games playable atmosphere on a Windows computer. ... DOS Version of Z running in DOSBox in Debian. ...

Another solution is to use virtualization software such as VMware Workstation or VirtualPC to run other versions of Windows or MS-DOS. DOSBox will also allow 16-bit Windows applications to run by running Windows 3.1 on the emulator.[3] In computing, virtualization is a broad term that refers to the abstraction of computer resources. ... VMware Inc. ... Screenshot of Virtual PC 6. ... DOS Version of Z running in DOSBox in Debian. ...

Known issues

There are some common issues with Windows XP Professional x64 Edition.

• Driver compatibility - some hardware companies haven't written 64-bit Windows drivers for their products.
• Many 32-bit Windows Explorer extensions fail to work with 64-bit Windows Explorer (due to the fact that 32-bit programs cannot interface with 64-bit in-proc DLLs and vice-versa). An example of this is the inability to install the context-menu options for applications such as zip utilities.
• Most 16-bit applications are not supported (32-bit software with 16-bit installers based on ACME Setup versions 2.6, 3.0, 3.01, and 3.1 and InstallShield versions 5.x will run correctly)
• No native support for Type 1 fonts.
• Windows Media Player 11 for this version of windows unusually runs as a 32-bit application. The only use for the specific release of Windows Media Player 11 is that the other applications such as Media Sharing do in fact, run 64-bit. Mini player mode on the taskbar is not available.
• ID3 tag information from music files are not viewable in the Windows Explorer.

Windows Explorer running on Windows Vista Windows Explorer running on Windows XP Windows Explorer is an application that is part of modern versions of the Microsoft Windows operating system that provides a graphical user interface for accessing the file systems. ... Look up zip, zipper in Wiktionary, the free dictionary. ... This article or section is in need of attention from an expert on the subject. ... Windows Media Player (WMP) is a proprietary software digital media player and media library application developed by Microsoft that is used for playing audio, video and images on personal computers running the Microsoft Windows operating system, as well as on Pocket PC and Windows Mobile-based devices. ...

Advantages

• Can address more than 4GB memory, most new motherboards support 8GB now
• Is immune to 32-bit viruses as most windows files are 64-bit
• Uses the Windows Server 2003 Kernel, currently the most stable Windows platform available
• Faster encoding of audio/video when using 64-bit compiled programs
• Has access to the extra registers of the x86-64 architecture
• Faster loading in 64-bit compiled games

Miscellaneous

During the initial development phases (2003–2004), Windows XP Professional x64 Edition was named Windows XP 64-bit Edition for x86 Extended systems and later, Windows XP 64-bit Edition for Extended systems, as opposed to 64-bit Edition for Itanium systems.

Because of their lineage to Windows Server 2003, Windows XP Professional x64 Edition (along with Windows XP 64-bit Edition Version 2003) are the only versions of Windows XP to ship with IIS 6.0 (all other versions of XP have IIS 5.1). This does not cite any references or sources. ... Microsoft Internet Information Services (IIS, formerly called Internet Information Server) is a set of Internet-based services for servers using Microsoft Windows. ...

Trial Software

For some time now, Microsoft has warranted a fully functional free trial download of this operating system found here. On the web page, Microsoft lists the trial as one that can be evaluated "for 120 days". In order to qualify for the trial, one must register a valid email address and go through an "order" process. An email is sent by Microsoft that includes the link to the download (of the trial ISO), as well as the temporary product key, and lists the trial software as being an evaluation for 120 days.

Service Pack 1

The RTM installation of Windows XP Professional x64 Edition is in fact labelled as Service Pack 1 in system properties. This update was made available for Windows Server 2003 but was already included in public versions of XP x64 Edition upon release.

Service Pack 2

Service Pack 2 (SP2) was released on the 12th of March 2007. This service pack is not equivalent to Service Pack 2 for 32-bit versions of Windows XP. In fact, due to the earlier release date of the 32-bit version, many of the key features introduced by Service Pack 2 for 32-bit (x86) editions of Windows XP were already present at RTM in this 64-bit (x86-64) counterpart.

• Download SP2
• List of Updates in SP2
• List of Security Updates in SP2

Notes and references

External links

• Microsoft.com - Windows XP Professional x64 Edition Home Page
• Resources for 64-bit developers: Links, Articles.
• PlanetAMD64.com - Forums, 64bit Software Database, 64bit Driver Database, 64bit News
• 64-bit Support, Forum, 64-bit News and Database
• Extended64.com - 64bit forums, help, news and database of drivers/software
• Start64! - Start on 64

Articles/Reviews

• Benefits of Microsoft Windows x64 Editions
• Can you benefit from adopting Windows XP Professional x64 Edition?
• ActiveWin.com: Microsoft Windows XP x64 Edition: Year in Review