If you install Microsoft security update called Security and Quality Rollup for the .NET Framework 3.5, 4.5.2, 4.6, 4.6.1, 4.6.2, and 4.7 for Windows 8.1, Windows RT 8.1, and Windows Server 2012 R2: September 12, 2017 (link), you might notice that WMS tiles served by GeoMedia WebMap (using Live loader) are not displayed anymore.
Microsoft has identified that the problem is in the WPF components updated by this patch.
Related Microsoft's Support article: