Fealing so angry and stupid after knowing that i have fake Dell laptop. Any suggestions or anything?

I bought this laptop in 2011 and for the same price as was the original and i was a naive teenager back then. There is no product id of this laptop, neither under it nor inside the system information. It is working on 32bit i3 processor with 3 gb ram. I have installed windows eight in it and honestly speaking i never had any problems with it, worked really good all these years. But now its not working fine. Some problems with window or i don't know. Whenever i tap on a place or window to write something it does not happen.(the writing cursor does not appear) also whole watching online shows, i cant watch it in full screen. It automatically returns to its smaller window no matter how many time i make it full screen.
Thing is i am fed up of this laptop now. Do you have any suggestions? How do people get rid of old latops?

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