Howzabout a clue? Did she load a free app? Install a new component. Move box from one area to another. Spill chocolate milk in/on it?
If you are familiar with the inner workings of a computer, open it up, remove all the boards and plug them back in. Same with memory and IDE cables, both cables at both ends. Try again.
While it doesn't cycle, one of my desktops occasionally gets a "no hdd" error and freezes. I gotta turn it off, give it a slight kick, and reboot. Works jes fine! It could be MANY things.
nb