Hi..my acer aspire laptop has recently started to shut itself down whilst watching you tube clips!..it will play the clips for approx. 30 - 40mins with no problems and then just shut down completely..i can restart the laptop again instantly with no problems, and after going through the start up process, it returns to the site that i was watching. This only seems to happen when the clips are 'full length', i.e. 45mins and over, it does not happen whilst watching 'short' clips and the rest of its workings are normal. Anyone have any help or suggestions before i take it to the shop?