I'm new to SINS and I haven't been having much luck.  Running Vista with Realtek Audio and Microsoft Wireless Keyboard and Mouse.  At first I had no sound in gameplay but updated to the latest driver and that resolved it.  I also set the game to play at a higher resolution which seems to help.

That said, when I use the middle mouse button to scroll, I seems to only want to zoom out.  The odd time it zooms in one level but if I continue scrolling forward it starts zooming out.  Any ideas?  Game is pretty much useless like this.