Not 100% sure if this will work, just throwing out stuff I can think of.
1) For your windows 7 do you have all the latest windows updates installed?
2) I see you already tried above right-click properties stuff, searching on google shows that above method you tried worked for most. Wonder what's different this time.
(http://forum.square-enix.com/ffxiv/t...-a-Vista-patch)