WoW64 (Windows 32-bit on Windows 64-bit) is a Windows operating system subsystem capable of running 32-bit native applications and is included in all 64-bit versions of Windows Bit (including Windows XP Professional x64 Edition, Windows Server 2003 x64 Edition, and Windows XP 64-bit Edition). WOW64 delivers all the differences between 32 and 64 bit Windows, in particular the structural changes of the same operating system.
File System[]
The Wow64 subsystem also deals with other major aspects of 32-bit applications. For example, it is involved in managing 32-bit application interactions with the Windows registry, which is quite different in the 64-bit operating system version, and provides a subsystem memory interface. The operating system uses the% SystemRoot% \ system32 directory for its libraries and executable files rather awkwardly. When 32-bit applications are running, WOW64 redirects requests for DLLs from this directory to% SystemRoot% \ sysWOW64, which contains old executables and old libraries.