Not sure how you go with it's guarantee it is usually only for 1 year but I have heard it mentioned that it may be longer.
I don't suppose you have contacted QVC or HP to see if it still can be fixed under warranty.
You would expect a new notebook to last well over a year.
No doubt someone will be able to give you the proper advice on it.
Sorry I can't help you with a choice of new ones as I have never had one before and some of the ones I have had a play with were a bit to fragile for me.