Update information This update improves the stability and reliability of Windows 7 and of Windows Server 2008 R2.
To install the correct version of this update, you must know whether you are running the 32-bit or the 64-bit version of Windows 7 or of Windows Server 2008 R2. If you are not sure which version of the Windows operating system you are running, or whether it is a 32-bit version or 64-bit version, see the "How to determine whether you are running a 32-bit or a 64-bit edition of Windows" section.