I ran into this solution on another forum so if you've installed the game then go to play it and the Load Screen goes dark here is what fixed it for me:
Vista 64
Start --> Control Panel --> Programs (The top selection Programs not the sub) --> Programs and Features --> Turn Windows Features off/on
When that comes up Turn off --> Tablet PC optional Components (this process can take about 5 minutes then it reboots)
This fixed the problem for me, now the only problem I have is the game runs like crap from bad drivers on my top end system. I was able to play it though
Use at your own risk although its a turn on/off feature so shouldn't be too risky
Vista 64
Start --> Control Panel --> Programs (The top selection Programs not the sub) --> Programs and Features --> Turn Windows Features off/on
When that comes up Turn off --> Tablet PC optional Components (this process can take about 5 minutes then it reboots)
This fixed the problem for me, now the only problem I have is the game runs like crap from bad drivers on my top end system. I was able to play it though
Use at your own risk although its a turn on/off feature so shouldn't be too risky