I am also wondering, what errors have users told you about your current upnp config and startup crashes? All the information helps as I really need a solid solution for my game or I might just have to retract to the dark ages of making users open ports themselves. Which I really don't want to do.
Hey William, I'm sorry I somehow missed your questions. The only error I've heard about is the one when "msvcr100.dll" is missing. If I include it, the only error I've heard about is when for some reason the user's computer doesn't like it and they need to remove it and install the appropriate Microsoft redist.
One option is to actually include the Microsoft Visual C++ 2010 Redistributable Package with your game.
A couple of times I've been unable to open ports from my computer (also Windows 7 64bit), but most times it works fine.
