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Thank you all! Unfortunately its a five hour drive from my house to my relative's house and I have to rely upon an extremely kind neighbour to assist in taking the computer back to PC World. I have contacted both the helpline and the store where the computer was purchased but, unfortunately, neither were very helpful. After having spoken to the kindly neighbour, she has assured me that she will arrange to have the computer taken back to the store where it was purchased on Friday. Fingers crossed that it will be sorted then!