[YuKi]

You can become knowledgable in computers which makes you good at it, but to become an expert that is another thing. None can know all the software that everyone users, there is hundreds and hundreds of them and you can't expect someone to know what all the pieces of software that is out there.

But people can become proficient with a specific thing within computers, i.e. looking after servers, or desktop support etc.. When people are stuck at something, what makes them an expert is there ability to research into the problem and finding a solution to it. i.e. google. =P