Welcome to the forum, as for having a problem it's hard to say really given the small amount of information you've given us.
What exactly do you mean by "hang something usually when staring" do you mean it takes a long time for your computer to boot up, how many programs do you have starting with Windows ? Is it something that happens all the time or just occasionally, what are you doing when it does happen and do you get any error messages ?
Is your machine a laptop or desktop and how long have you had it, is it still under warranty ?
Please post back with as much information as you can give and I'm sure on of the experts will be able to help you out.