Well this is... weird. You said you've just reinstalled Windows XP. Have you installed Service Pack 3? Have you got all the up-to-date drivers and everything? I honestly don't have any clue what the problem is, I'm just tossing shit out there and trying to see what sticks.
I honestly have no idea how you might solve the problem if neither of those things work and all the other stuff you tried didn't work. Hopefully th15 or someone else who knows what the problem is will be able to help.
Also this thread is in the wrong board.
Should've been in the Bug Reports thread, or the General Discussion board, as it does not pertain to Shipmaker or Shipmaking or helping with either.