Re: I think i have done something wrong...
no CD at all?
I hope it isn't one of the "make your recovery CD from the hidden partition" jobs. You could load up with a BartPE disk and see if there is another partition on there which "may" contain your recovery disk files but I'm not sure how you'll go, you may be lucky and the Ubuntu install hasn't touched the partition.
Regardless you're in deep trouble if you don't have a disk, be it a recovery disk or a Vista disk, you say you're "nearly 100% sure", it might pay to check and be 100% sure.
Have you contacted PC World to see what they have to say? Find out if there is a hidden recovery partition and how to access it if it does exist?
Last resort would be to buy Vista I suppose.
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