That's interesting. GUI loads up fine, graphically as does (apparently) the player character and at least one placeable. What kind of video card do you have in that computer and are the drivers up to date? I'm not so great a fixing problems like this (I've never seen this before) but I'm curious. My instinctive first response is to get the critical rebuild of 1.69 and install that, but that might just be a wild goose chase.
It may be a bit "overkill" to download
this (it's 150 megs), but if nobody can cough up an answer, you might try searching there.