KB2952664: Compatibility update for upgrading Windows 7
"This update helps Microsoft make improvements to the current operating system in order to ease the upgrade experience to the latest version of Windows."
KB3021917: Update to Windows 7 SP1 for performance improvements
"This update performs diagnostics in Windows 7 Service Pack 1 (SP1) in order to determine whether performance issues may be encountered when the latest Windows operating system is installed. Telemetry is sent back to Microsoft for those computers that participate in the Windows Customer Experience Improvement Program (CEIP)."
KB3035583: Update installs Get Windows 10 app in Windows 8.1 and Windows 7 SP1
"This update installs the Get Windows 10 app, which helps users understand their Windows 10 upgrade options and device readiness."
KB3068708: Update for customer experience and diagnostic telemetry
"This update introduces the Diagnostics and Telemetry tracking service to existing devices. By applying this service, you can add benefits from the latest version of Windows to systems that have not yet upgraded."
KB3075249: Update that adds telemetry points to consent.exe in Windows 8.1 and Windows 7
"This article describes an update that adds telemetry points to consent.exe in Windows 8.1, Windows RT 8.1, Windows Server 2012 R2, Windows 7 Service Pack 1 (SP1), and Windows Server 2008 R2 SP1. Before you install this update, check out the Prerequisites section."
KB3080149: Update for customer experience and diagnostic telemetry
"This package updates the Diagnostics and Telemetry tracking service to existing devices. This service provides benefits from the latest version of Windows to systems that have not yet upgraded. The update also supports applications that are subscribed to Visual Studio Application Insights."
KB3112343: Windows Update Client for Windows 7 and Windows Server 2008 R2: December 2015
"This update enables support for additional upgrade scenarios from Windows 7 to Windows 10, and provides a smoother experience when you have to retry an operating system upgrade because of certain failure conditions. This update also improves the ability of Microsoft to monitor the quality of the upgrade experience."
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Superseded Updates:
KB2990214: Update that enables you to upgrade from Windows 7 to a later version of Windows (superseded by KB3050265)
"This article describes an update that enables you to upgrade your computer from Windows 7 Service Pack 1 (SP1) to a later version of Windows."
KB3022345: Update for customer experience and diagnostic telemetry (superseded by KB3068708)
"This update introduces the Diagnostics and Telemetry tracking service to in-market devices. By applying this service, you can add benefits from the latest version of Windows to systems that have not yet been upgraded. The update also supports applications that are subscribed to Visual Studio Application Insights."
KB3050265: Windows Update Client for Windows 7: June 2015 (superseded by KB3065987)
"General improvements are made to support upgrades to a later version of Windows."
KB3065987: Windows Update Client for Windows 7 and Windows Server 2008 R2: July 2015 (superseded by KB3075851)
"This article describes an update that contains some improvements to Windows Update Client in Windows 7 Service Pack 1 (SP1) or Windows Server 2008 R2 SP1. This update is incompatible with Windows Server Update Services (WSUS) servers without the hardening update 2938066."
KB3075851: Windows Update Client for Windows 7 and Windows Server 2008 R2: August 2015 (superseded by KB3083324)
"This article describes an update that contains some improvements to Windows Update Client in Windows 7 Service Pack 1 (SP1) and Windows Server 2008 R2 SP1. This update also resolves an issue in which certain Windows Update operations fail when you install Windows Update Client for Windows 7 and Windows Server 2008 R2: July 2015 (3065987) on Windows 7 Embedded editions."
KB3083324: Windows Update Client for Windows 7 and Windows Server 2008 R2: September 2015 (superseded by KB3083710)
"This article describes an update that contains some improvements to Windows Update Client in Windows 7 Service Pack 1 (SP1) and Windows Server 2008 R2 SP1."
KB3083710: Windows Update Client for Windows 7 and Windows Server 2008 R2: October 2015
"This article describes an update that contains some improvements to Windows Update Client in Windows 7 Service Pack 1 (SP1) and Windows Server 2008 R2 SP1." (superseded by KB3102810)
KB3102810: Installing and searching for updates is slow and high CPU usage occurs in Windows 7 and Windows Server 2008 R2
"This article describes an update that contains some improvements to Windows Update Client in Windows 7 Service Pack 1 (SP1) and Windows Server 2008 R2 SP1."
"The Svchost.exe process occupies 100 percent of CPU usage
when you upgrade a Windows Update client to Windows 10." (superseded by KB3112343)