I recently purchased a new Dell XPS 9310 Laptop and it's behaving strangely. Since day one there have been times when the screen freezes briefly and then shows weird multi-colour lines and dots until I press the start button again. It looks a bit like an acid technicolour painting! I haven't bought a new laptop for over 8 years but I really wouldn't expect this from a new model that is near the top of their range. Does anyone know what this problem is? I'd like to be specific when I contact Dell technical support and maybe request a replacement under warranty. Thanks all!