When I watch movies on my Packard bell laptop that I've downloaded it works perfect but if I'm downloading at the same time the video I'm watching starts to freeze and stutter. As soon as I stop downloading it goes perfect again. This never used to happenen no matter how much stuff I was downloading the video playback was unaffected. I seem to have pleanty of spare memory and I deleted cookies but still I have this problem. Any idea how I can cure it please ?