Originally posted by LikeASong:"Compaq HP" is not a modelThere are models that come with a specific button to access the factory reset menu, others use a F10 / F11 / F12 key at the start, others need a recovery CD... Anyway, you should be able to format it anyway just having the Windows installation CD/DVD. Start your PC with that disco inserted and you'll be directed to the Windows installation menu. Format your hard disc and every problem *should* disappear...
Try the buttons Sergio said. If no luck, try searching in Google for your laptop's complete model name + recovery. That's how I found my laptop's recovery menu button
