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 ...

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 ...