Sysnative is documented on MSDN:ģ2-bit applications can access the native system directory by substituting %windir%\Sysnative for %windir%\System32. Either create a 64bit executable, or use the Sysnative alias in 32bit code that runs inside of WOW64.
If you have created a 32bit app that is running inside of the WOW64 emulator on 64bit systems, the C:\Windows\System32\ folder is silently redirected by WOW64 to the C:\Windows\SysWOW64\ folder, which does not have an msconfig.exe file.
