Yes, you heard it right. Microsoft (MSFT 0.39%) will stop supporting Windows Phone versions 7.8 and 8.0 just 18 months from their respective release dates. Users that are deemed unable to upgrade to the next version of Windows Phone on their devices will no longer receive security updates and general software enhancements when the expiration period is reached. In this video, Motley Fool contributor Steve Heller discusses Microsoft's likely motivation behind this seemingly poor choice and what it could mean for investors.