+ 0 Votes A couple of suggestions. gdburton July 8, 2013 at 7:57am PST 1. Convince yourself that the power brick is able to provide power. (Easy method is to remove battery and run on mains power alone.) If this does not work then battery may have not be charged for a while and finally got too low to run machine. 2. If system runs on mains power without battery, but fails to run on mains when battery is plugged in then the battery is causing the problem. The power brick cannot provide enough power to run the machine & charge a failing battery. Leaving the laptop plugged in, but switched off overnight may allow the battery to charge up enough. But generally in many cases, this situation is an indication that the battery is ready for replacement. Hope this helps. + 0 Votes Reponse To Answer Ndiaz.fuentes July 8, 2013 at 11:24pm PST "then run a vacuum nozzle over it to suck it out" I'd be very cautious about this step. A powerful vacuum can wreak havoc on delicate insides. It can be done, but you should be careful. + 0 Votes I had this happen to me vanman666 July 8, 2013 at 11:57am PST My other half downloaded and ran a file that caused this issue The only solution i had was to boot from the install disk rather than the HD and repair the disk that way. Hope it helps + 0 Votes Probably Overheating CPU euromarkus July 8, 2013 at 5:40pm PST Shutdowns like the one you are experiencing, are typically caused by the CPU overheating. The shutdown is to protect the CPU from damage. Overheating CPUs are caused by bad airflow: either a fan is bad (rare), or more than likely, a fair amount of dust is clogging the airway. If it's dust, use a can of compressed air near the vents to loosen the clumps, and then run a vacuum nozzle over it to suck it out.