This article describes the software update that applies to versions of Windows 7 and Windows Server 2008 R2 that are mentioned in the "Applies to" section. This software update will be a prerequisite to install service packs. Additionally, this update improves reliability when you install or remove Windows 7 and Windows Server 2008 R2 updates and service packs.
Note This update is replaced by the update that is described in the following article in the Microsoft Knowledge Base:
2533552 An update that prevents a "0xC0000034" error message when you try to install Windows 7 SP1 or Windows Server 2008 R2 SP1 is available