Chosen Solution

when i switch on the laptop after a couple of days then it works fine for about 15-20 minutes, after that it shutdowns. when i again switch on the laptop it again shutdowns during booting within 15-20 seconds, and continues to shut down again and again.. It only works fine for 15-20 minutes, when it switch it on after quite a time. anyone, please help, as my that laptop has became completely useless.

Have you tested your battery and your power cord? They are notorious on Dells for crapping out. Sounds like it not getting enough amps to charge the battery or the battery cells are about done. I would start there and then move to software related diagnostics.

When it cools down , you can you use for 15-20 minutes , the Processor will send signal to Protection circuit to shutdown when it reach the maximum tolerance of over heating, it means you have a defective cooling system, e.g., Fan is stuck-up or full of dust and can’t rotate, try cleaning it or replace with new one, I encountered hundreds of cases like this. just give a try. good luck