 Focus stealing can cause damage, as users may, while typing when their attention is away from the screen, inadvertently agree to a program doing something that causes damage.For example, when Microsoft Windows pops up the Disk Cleanup wizard, the user may "agree" to deleting files without realizing that the wizard was waiting for input.Focus stealing can also occasion security breaches, for example, when a user enters a password and the typed password appears instead in a new instant-messaging window in an unmasked input field.