I just bought Dell Inspiron 17 7778 ! After usage of 45 mints i can feel its warm beneath! A bit hot ! Cpu temp is between 40-43 C Is it normal?
One more thing how i can check whether laptop is Refurbished or Not?
That's a perfectly reasonable temperature. As for the rest, if it was purchased from Dell, it's whatever your invoice states - refurbished or new. If you purchased it elsewhere, contact the seller.