Is there any special reason you're using the cross platform method to install on Windows?
Instead, you could use the Windows installer to install the stable version and then upgrade to the latest version by following the instructions for getting updates @ http://www.tersus.com/#Id=239 (make sure you setup the latest update site).
If you wish to figure out the reason the cross platform install fails, I suggest you post the following:
Regards,
David
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