My name is Debbie.
I am sorry to hear about Overheating issues with your system. Yes Firefoxthebomb is absolutely right; you can check the hard drive faults by following those steps. Automatic shut down issue could be due to overheating ,For overheating you can first check the air cooling vents and make sure that the passages are not clogged with lint and other stuff.
Simply raising your laptop off of any flat surface will allow fresh, cool air to come in from the intake on the bottom of the laptop. This will solve many of the heat issues you might be having.
Also, let it be known that you should NEVER have your laptop on any type of soft surface, such as a pillow, blanket, thick carpet, etc.; Doing so will not allow ANY cool air to enter the fan intake, and could cause more system hang ups and permanent component damage. Keep it on a flat, hard surface at all times
Remove the battery and charger/ac adapter/power cord from your notebook, press and hold the power button for 20 seconds to discharge any residual current inside the laptop. This clears your RAM and is like hardware reset. Replace the battery and charger/ac adapter/power cord and turn your notebook on.
Boot in "safe mode". See if your notebook works normal.
If the problem persists, did you check if it could be your notebook power cord or power source problem? Insufficient power might cause error messages that are misleading. Take the battery out and power on your notebook with the charger only. Make sure your notebook power jack and charger plug tip are securely connected. Did you notice the power jack loose?
Run the Hardware Diagnostics.
Update the Bios Of your computer.
Please reply in case you have any questions.
Thanks & Regards
Edited by Orange Blossom, 04 August 2012 - 08:15 PM.
Removed spammy content. ~ OB