I bought this laptop on 16 Jan 16, but the warranty information shows the warranty ends at 2015
I'd suggest you contact Technical Support in the link below. Hopefully one of the Dell reps see this thread and be a help to you.
Hi PO YAN,
Kindly private message me the service tag and your contact details. I shall review the order details. Also, if the system was purchased through a reseller, kindly provide a copy of the invoice.
Let us know if you have any other queries.