OKay, here's the deal. My old operating system, Vista, had a lan error and thus wouldn't start. So I was told to either reinstall Vista or do a clean install of Windows 7. So I went and bought Windows 7(as my computer didn't come with the full Vista disk) and am trying to do an install instead of an upgrade. Problem is, after the screen where it says it's finalizing my windows set up, like asking for the product key and which network I want, I get a black screen. As my old windows won't even start I have no way of accessing it and changing anything. This is my third time trying, as the first two I had power issues and I'd rather not have to start again and have it take all day. Help!