I've got a problem which is probably really easy to fix, but I can't work out how. When I got my dell machine and was going through the intial start-up, I think I chose the wrong country for the keyboard settings. It has always worked fine, although irritatingly the " and @ symbols are reversed. That is <shift 2> delivers an at sign, while <shift '> delivers the inverted commas.

Any ideas on how this annoyance can be fixed?

Thanks