Recovery disk can help salvage computer that won't start

The HP desktop computer we bought on Amazon less than two months ago wouldn't start. For a few hours, we panicked. The solution? Unplug the machine. Hold the power button until the little light on the back of the computer goes off. (That's if it's a desktop computer, the type sometimes called a tower.) This frees the computer from hibernation mode. Viola, as we say in fractured French! It's fixed!