According to Microsoft’s vague review of the update, it contains ‘some improvements to Windows Update Client in Windows 7 Service Pack 1 (SP1) and Windows Server 2008 R2 SP1’. Also, the update replaces a previously released update – KB3083324, which has the same description. Not surprisingly, KB3083324 replaces the August 2015 Windows Update Client update KB3075851… which replaces KB3065987 from July. All of the updates contain ‘some improvements to Windows Update Client in Windows 7 Service Pack 1 (SP1) or Windows Server 2008 R2 SP1’.
Next on the list is KB3050265 which was incompatible with Windows Server Update Services (WSUS) servers without the hardening update KB2938066. KB3050265 replaced the KB2990214. The KB2990214 update ‘enables you to upgrade your computer from Windows 7 Service Pack 1 (SP1) to a later version of Windows‘. Voila!