leptop shurt down

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yes Sir I am using my Laptop regularly Toshiba satellite C55-A 5302 . I was checking all of the air vents are clear .and some overheating all Leptop but exact after 30 min this laptop is off no be four 30 min and no after 30 min .you pl help me
Does it shutdown after 30 mins when you are actually using it ... or just when it is idle?

I wonder if it might be overheating. Check all of the air vents around the laptop and make sure they are clear.

How hot it it over there?
 
yes Sir I am using my Laptop regularly Toshiba satellite C55-A 5302 . I was checking all of the air vents are clear .and some overheating all Leptop but exact after 30 min this laptop is off no be four 30 min and no after 30 min .you pl help me
 
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