Hi. New member here. First post.\n\nI've had an Aspire One Model ZA3 for over two years now, and love its compact size and light weight. Other than that, the jury is still out with some of its quirky issues.\n\nThe problem I am experiencing at this time is that the unit shuts down unexpectedly after about 20 minutes of use. This occurs regardless of whether it is operating on battery power or plugged in and charging. The unit I have has 2 gigs of memory, and a 250 gig hard drive. It has never been more than half-full at any one time. \n\nI have two homes, and two different ISP's. Comcast in PA, and Verizon in FL. The fault occurs on both networks.\n\nI also have both Internet Explorer and Safari loaded on this system. The fault occurs regardless of which one is in use.\n\nWhen it shuts down, it does so without warning. The only way to power it back up at that time is to hold down the power button, and then re-boot it. \n\nIf anyone has any thoughts as to why this may be happening, I would greatly appreciate hearing them. Thanks in advance.