Microsoft removes Windows 8.1 Update from WSUS update servers
Microsoft warns that the new Windows 8.1 Update may keep some computers from scanning Windows Update for more patches
From the WSUS and Windows Update Teams Blogs:
Windows 8.1 Update (KB 2919355) prevents interaction with WSUS 3.2 over SSL
There is a known issue which causes some PCs updated with the Windows 8.1 Update (KB 2919355) to stop scanning against Windows Server Update Services 3.0 Service Pack 2 (WSUS 3.0 SP2 or WSUS 3.2) servers which are configured to use SSL and have not enabled TLS 1.2.
When Microsoft releases an update that resolves the issue, you may re-enable HTTPS on WSUS.
Microsoft plans to issue an update as soon as possible that will correct the issue and restore the proper behavior for Windows 8.1 Update KB 2919355 scanning against all supported WSUS configurations. Until that time, we are temporarily suspending the distribution of the Windows 8.1 Update KB 2919355 to WSUS servers.
You may still obtain the Windows 8.1 Update (KB 2919355) from the Windows Update Catalog or MSDN. However, we recommend that you suspend deployment of this update in your organization until we release the update that resolves this issue. You may also find the workarounds discussed in this article to be useful for testing this Windows 8.1 Update for your organization. Thank you for your patience during this time.
J W Stuart: http://www.pagestart.com