Vista x64 here works like a charm
. No worry.
And I would recommend anyone who had a slight interest in modern naval combat and modern submarine warfare to get DW. It's the only one out there. With supermod such as Alfa Tau, LWAMI or DWX makes it even more interesting. DW is the only sim I've installed that comes without a dynmaic campaign in it. It's a testament that despite the lack of dynamic campaign it has got a long shelve period to me and I'm not foreseeing myself uninstalling it in the near future especially that the updated DWX is coming out.