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WoW64

WoW64
Windows on Windows 64 bit. WoW64 is a Windows subsystem that runs on 64 bit Windows to enable 32 bit Windows applications to run in the 64 bit operating system.

WoW64 redirects request for 32bit DLLs to %SystemRoot%\sysWOW64. Whilst unintuitive, the folder %SystemRoot%\System32 provides 64 bit versions. Apparently the justification for placing 64 bit code in %SystemRoot%\System32 is for compatibility reasons.

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