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That is... super weird.  It seems to suggest that the dll is somehow incompatible with your system.  Your system seems like it would be more than enough to run it.  
Oh!
Try this.  Sometimes windows tries to protect you from stuff.  Re-download the archive, right click on it and go to properties.  There should be an option at the bottom of the general tab called 'Unblock".  Check that box and click okay, then try extracting it and running it.