I use Windows Live Mail for email & Windows Photo Gallery for photos.  I had no problem sending photo emails with Windows 7 or Windows 8, but now that I have updated to Windows 10, I can no longer send photo emails.  I get the message that "an unknown error has occurred" error 0x8007007A.  I am not particularly fluent in "computer-eeze" and simply want a product that operates efficiently & easily.  Windows 7 seemed to suit my needs far more than Windows 10.