laptop turning of over heating porblem

Well - yeah - there's something wrong with the battery and the cooling system around it. I am guessing that's why you could "find" it. Have you tried taking to it somewhere where it could be serviced? Not necessarily for them to do any work, just ask what they think is wrong, and for an estimate of what it would take to fix it. $1,000? Forget it. $100? It might be worth it to just let them do the work. Something in between? At least you'd have a much better chance of knowing what the problem was, and then could make an informed judgment about your budget (if you wanted to pay them to do the work) or your skill set (if you wanted to attempt the repair yourself).

What model is your laptop? Does it have heat sensors on the the motherboard? If it does then try using a monitor program that will tell you the temperatures when the system is running. That will tell you if the system is running hot compared to the normal operating temperatures. I would suggest googling your laptop model and 'temperature monitoring" to see what comes up. There may be some good "how to" posts that will walk you through the process and tell you what temperatures others are getting. Most modern processors can run at 60C.

When you opened it, did you blow it out with compressed air to get all the dust out of the case? Dust build up can prevent proper cooling.