Over the years, writing about technology, I've produced many guides on how to do cool stuff (by my definition, at least) with your computer. But in all that time, I failed to devote any attention to ...

Quantum computers, systems that process information using the principles of quantum mechanics, could solve some problems that cannot be tackled by the classical computers currently used worldwide.

Q. When I go to my Windows XP “Task Manager” screen and look at the processes, there are usually 60 of them running. What really NEEDS to be running? How do I know what ones I should end process, and ...