I just found this article ...
http://news.softpedia.com/news/KB3038314-Issues-Possible-Workaround-Found-479143.shtml
seems reasonable
I had a bunch of updates kept failing to install.
such as ...
KB2923545 RDP - update for the Remote Desktop Protocol (RDP) 8.1
KB3020388 RDP - MS15-004: Description of the security update for Windows 7 and Windows Server 2008 R2 if the Remote Desktop Connection 8.1 client update is installed: January 13, 2015
KB3021952 IE - MS15-009: Description of the security update for Internet Explorer: February 10, 2015
KB3036493 RDP - MS15-030: Description of the security update for Remote Desktop protocol: March 10, 2015
then after taken advice in that article:
- install them all without KB3038314 together,
they all installed successfully!!