Microsoft sends all Windows 10 users urgent warning Ignoring the issue could be costly The video will auto-play soon8Cancel Play now There are always big stories on WalesOnline - don't miss any with our daily emailInvalid EmailSomething went wrong, please try again later. Sign me up now We use your sign-up to provide content in ways you've consented to and to improve our understanding of you. This may include adverts from us and 3rd parties based on our understanding. You can unsubscribe at any time.More info Thank you for subscribingWe have more newslettersShow meSee ourprivacy notice Microsoft is issuing an urgent warning to all its users of Windows 10 operating systems.