Hi Snaps888,
Is the service package 1 installed in the machine ?
To install this update ,the Service Pack 1 should be installed .Here is a link for reference :
Update enables additional capabilities for Windows Update notifications in Windows 8.1 and Windows 7 SP1
https://support.microsoft.com/en-us/kb/3035583?wa=wsignin1.0
If the service package 1 has been installed ,please run the following readiness tool and then manually install it to have a check.
What is the System Update Readiness Tool?
http://windows.microsoft.com/en-HK/windows7/What-is-the-System-Update-Readiness-Tool
Apart from this ,please check the Event Viewer and the Windowsupdate.log (Search it directly)for more information to troubleshoot this issue .
Event Viewer \Application ,System ,Setup
Best regards
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