Isso é um Black Magic (TM) do Windows: link
Don't be concerned if autoruns reports these files as not found. Just ignore it. These three files are critical to (and invisible to) 32-bit processes running on a 64-bit processor.
For a little fun you can see this by launching both the native and x86 versions of Windows PowerShell, type the following in both. Somewhat surprisingly you'll get different results:
cd $env:windir\system32 dir wow*