My Compaq Presario notebook PC has a folder named Recovery Manager on the All Programs menu. If I open that folder, it has a menu item, also named Recovery Manager, which will start the recovery tool. I believe this may vary among different brands of computers, but that's how mine is set up.
Keep in mind a full restore will erase all your files, so backup everything you want to keep before proceeding with this. If you want to save email messages, email account setups, browser bookmarks/favorites, etc., in addition to other files, you'll need to include them, too. You'll need to backup to an external media, such as CD, DVD, flash drive, or external hard drive.