The white screen is caused by not having up to date Intel graphics drivers. You will be fine if you update the drivers, or buy a laptop with Nvidia or ATI GPU.
I run it on a Win8 laptop with a 1st gen Intel Core processor. I have the latest drivers but still get minor issues, like the white screen and the occasional audio lag in videos. Other than that it's perfectly playable.
I just purchased a brand new laptop (Dell) updated the graphic card and absolutely no issues running BGEE. In fact it runs better on Windows 8 than Windows 7, dont ask me why because I dont know. I dont have any movie stutter on 8.
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I dont have any movie stutter on 8.