Laptop D630 hang problem

i have dell laptop d630 and its giving problem, when i use it for 2 hours its become hang our desplay b kharab ho jata ha, bohat martba ye hoa ab jab restart kya tu start ho jata ha magar desplay nahi araha. anyone guide me whats happen...

Draw backs of used product.

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Laptop zada garam tu nahi ho jata? agar normal se zada heat hai tu koi achi brand ka cooling pad use karo shayad zada heat ki waja se hang ho jata ho.

According to the website below this is common problem with this laptop model:

Does it have Nvidea graphics? If it does, then that card is going to fail.

is it andriod?????????? or java ??