- WoW64
WoW64 W indows 32 bit o n W indows 64 bit is a subsystem of the Microsoft Windows Windows operating system that is capable of running 32 bit applications and is included on all 64 bit versions of Windows including Windows XP Professional x64 Edition , IA 64 and x86 64 x64 versions of Windows Server 2003 , as well as 64 bit versions of Windows Vista , Windows Server 2008 , and Windows 7 . In Windows Server 2008 R2 Server Core, it is an optional component. WoW64 is designed to take care of many of the differences between 32 bit Windows and 64 bit Windows, particularly involving structural changes to Windows itself. Translation libraries The WoW64 subsystem comprises a lightweight compatibility layer that has similar interfaces on all 64 bit versions of Windows. It aims to create a 32 bit environment that provides the interfaces required to run unmodified 32 bit Windows applications on a 64 bit system. Technically, WoW64 is implemented using three dynamic link library dynamic link libraries ... versions of 64 bit Windows, WoW64 s implementation varies depending on the target processor architecture ... The WoW64 subsystem also handles other key aspects of running 32 bit applications. It s involved in managing ... to use that path. When executing 32 bit applications, WoW64 transparently redirects 32 bit DLLs to tt ... cannot be set to be the default browser. A bug in the translation layer of the x64 version of WoW64 ref cite web url http zachsaw.blogspot.com 2010 11 wow64 bug getthreadcontext may return.html title WOW64 bug GetThreadContext may return stale contents accessdate 2010 11 15 last Saw first Zach authorlink ... Forums en windowscompatibility thread 1558e9ca 8180 4633 a349 534e8d51cf3a title WOW64 OS bug Old 32 bit XP apps failing under Win7 WOW64 accessdate 2010 11 15 date November 11, 2010 work Microsoft ... as Boehm GC, thus also making it incompatible under Wow64. No fix is planned and no workarounds have ... de WOW64 es WOW64 ko WOW64 it WOW64 nl WoW64 ja WOW64 pl WOW64 ro WOW64 ru WOW64 fi WOW64 ... more details
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- Windows on Windows
About the Win16 subsystem in 32 bit Windows NT the 32 bit compatibility layer in 64 bit Windows WOW64 Multiple issues refimprove July 2009 no footnotes March 2010 cleanup January 2011 Time context which refers to components that may no longer be in current Windows products. date May 2011 In computing , Windows on Windows commonly referred to by its acronym WOW or WoW is a software component of 32 bit versions of the Microsoft Windows NT family of operating system s that provides limited support for running legacy Windows API Win16 applications applications written for Windows 3.x . Alternatively WOW may also refer to support for running 32 bit applications on 64 bit versions of Windows known as WOW64 . Background Many Win16 applications can run without changes on 32 bit editions of Windows, complete with the limitations of such applications compared with applications written for Win32. The operating system thunk compatibility mapping thunk s 16 bit APIs to their underlying 32 bit equivalents in order to provide support for 16 bit pointer computer programming pointer s, memory models and address space . 32 bit Windows shortens long filename s into 8.3 filename s to allow their use by legacy applications. Application compatibility issues, notably around multiple users and the concept of least privilege , may prevent some applications that incorrectly assume write access to the whole file system from working on newer platforms. Furthermore, legacy applications that attempt to access hardware directly cannot do so in Ring computer security user mode . The Windows 9x series of operating systems functioned as hybrid 16 32 bit systems in the sense that the underlying operating system was not truly 32 bit, and therefore could run Win16 applications natively without the use of a distinct WoW component. 64 bit versions of Windows do not include the WoW Win16 support subsystem and therefore ... were only 32 bit . See also WoW64 Shim computing Compatibility layer External links http www.microsoft.com ... more details
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- Native x86-64 Windows software
Orphan date April 2010 Native x86 64 Windows x86 64 Windows software is software compiled to run on x86 64 processors under the Microsoft Windows operating system. Such software requires both a x86 64 processor and a x64 Windows operating system, and will not run under 32 bit Windows, on any x86 capable processor. Nor will this 64 bit software run under the 64 bit Itanium IA 64 processor. Note that additionally, not all x64 software will run on all of the various x64 versions of Windows, there being incompatibilities between some designed for Windows Server 2003 , Windows XP editions Windows XP Professional x64 Edition XP x64 edition , Windows Vista Vista , and Windows 7 7 this applies especially to device drivers . Comparison with 32 bit software The benefits of running native x86 64 software instead of 32 bit software include improved performance, security and the ability to address and use more memory. ref http www.microsoft.com servers 64bit x64 benefits.mspx ref Generally, 32 bit software can run on x64 Windows, using the WoW64 Windows on Windows 64 subsystem included on all 64 bit versions of Windows. However, due to limitations in 64 bit Windows, ref http support.microsoft.com kb 282423 ref some 32 bit software components have incompatibility issues. These include Kernel mode device drivers Windows Explorer Extensibility Explorer shell extensions ActiveX controls Dynamic link library Dynamic Link Libraries DLLs 32 bit software that runs on x64 Windows in the same manner as it does on 32 bit windows is usually called x64 compatible software as opposed to native x64 software . See also Windows XP editions References references Category Windows software Category X86 architecture ... more details
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- Windows XP Professional x64 Edition
named WoW64 Windows on Windows 64 bit WoW64 , which permits the execution of 32 bit x86 applications ... support for 32 bit instructions, WoW64 simply switches the process between 32 and 64 bit modes ... applications. On the Itanium architecture, WoW64 was required to translate 32 bit x86 instructions ... XP. Most applications may run without any problems owing to the nature of WoW64 however they may be unsupported ... 2.6, 3.0, 3.01, 3.1 and InstallShield 5.x hardcoded into WoW64 . ref name 64 bitonly rel note http ... more details
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- Wow
on Windows , an application compatibility layer in 32 bit Microsoft Windows WoW64 Windows on Windows ... more details
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- DiskTune
if it is running in a WoW64 environment and will disable the File System Redirector for its own process ... more details
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- Thunk (compatibility mapping)
layer, WoW64 , to allow use of 32 bit Windows applications. Thunks in dynamic linking Certain implementations ... more details
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- Common Gateway Interface
alive HTTP HOST example.com HTTP USER AGENT Mozilla 5.0 Windows NT 6.1 WOW64 rv 5.0 Gecko 20100101 ... more details
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- Windows XP editions
Bit Edition can run standard x86 32 bit applications through its WOW64 Windows on Windows 64 bit emulator ... Windows XP Professional x64 Edition uses a technology named WOW64 Windows on Windows 64 bit WOW64 , which permits the execution of 32 bit x86 applications. It was first employed in Windows ... for 32 bit instructions, WOW64 switches the processor between 32 and 64 bit modes. As a result, X86 ... more details
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- Environment variable
variable is itself 32 bit or 64 bit this is caused by WoW64 Windows on Windows 64 bit redirection ... more details
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- Microsoft Jet Database Engine
32 bit software running in WoW64 that acted as a proxy for the 64 bit client. ref cite web url ... more details
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- Windows Vista editions
can run 32 bit programs by running them within the WOW64 subsystem. Most 32 bit programs ... more details
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- Wine (software)
platforms, this is seen as a non issue. The 64 bit port of Wine also has preliminary WoW64 support ... more details
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- 64-bit
in a compatibility mode, also known as an Emulator emulation mode, e.g. Microsoft WoW64 Technology ... more details
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- Windows Registry
presented to 32 bit applications by WoW64 as HKLM SOFTWARE ref http msdn.microsoft.com en us ... more details
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- List of Microsoft Windows components
security context, depending on what privileges the contained services require. Windows on Windows and WOW64 ... more details
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- Half-Life 2
games to run natively on 64 bit processors, bypassing the WOW64 32 bit compatibility layer . Gabe Newell ... more details
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