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This security update includes quality improvements. No new operating system features are being introduced in this update. Key changes include:
For more information about the resolved security vulnerabilities, see the Security Update Guide.
| Symptom | Workaround |
| This update may fail to install with error 0x8000FFFF. | Before installing this update, install KB3177467, the last Servicing Stack Update for Windows 7 and Windows Server 2008 R2 SP1, to resolve this issue. |
| All Guest Virtual Machines running Unicast NLB fail to respond to NLB requests after the Virtual Machines restart. | This issue is resolved in KB4462915. |
| After installing this update, the Event Viewer may not show some event descriptions for network interface cards (NIC). |
This issue is resolved in KB4489878. |
This update is now available for installation through WSUS. To get the standalone package for this update, go to the Microsoft Update Catalog website.
File information
For a list of files provided in this update, download the file information for update 4457145.
Keywords: windows 7 sp1, windows server 2008 r2 sp1