[PeterT]

Just saw this Blog post --> http://blogs.msdn.com/b/dsvc/archive...e-startup.aspx and for the heck of it, tried a

dumpbin /headers kobo.exe

What looks telling is

Spoiler:

OPTIONAL HEADER VALUES
             10B magic # (PE32)
           11.00 linker version
            7A00 size of code
          9F1A00 size of initialized data
               0 size of uninitialized data
            710D entry point (0040710D)
            1000 base of code
            9000 base of data
          400000 image base (00400000 to 00DFBFFF)
            1000 section alignment
             200 file alignment
            6.00 operating system version
            0.00 image version
            6.00 subsystem version
               0 Win32 version
          9FC000 size of image

From http://msdn.microsoft.com/en-us/library/6sehtctf.aspx

Spoiler:

#define WINVER 0x0500
#define _WIN32_WINNT 0x0500

This targets the Windows 2000 operating system. Other valid values include 0x0501 for Windows XP, 0x0502 for Windows Server 2003, 0x0600 for Windows Vista, and 0x0601 for Windows 7.

So the MINIMUM OS level for this version of Kobo.exe is Windows Vista