Just from looking at the article you linked it looks to me like this should only really be effecting Windows Server 2003 and 2008. Smartermail currently requires Windows 2016 or higher and it doesn't look like there are any recent updates that would cause this issue. Are you running one of these older versions or did you experience this problem on a newer version Windows?
Jeffrey Werner
Software Developer
SmarterTools Inc.
www.smartertools.com