Right well I did have problems with a remnant of the visual c++ being installed still after I thought it had been uninstalled, but then I found if you have problems and it is fully installed then you can uncheck the debugger and it will install ok, I will reference the post infact.
http://www.darkbasicpro.co.uk/apollo/view.php?t=267&b=1
if you look here you will see the answer for yourself.
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