Windows Server Update Service - WSUS

Windows Server Update Services (WSUS), previously known as Software Update Services (SUS), Microsoft Windows Server Update Services and hotfix, a new tool for managing and distributing critical Windows patches that resolve known security vulnerabilities and other stability issues in Microsoft Windows XP, Windows Vista, Windows 7 and Windows Serverâ„¢ 2003 operating systems. WSUS downloads these updates from Microsoft Update website and then distributes them to computers on a network. WSUS runs on Windows Server operating system and is freeware.

The first version of WSUS was known as Software Update Services (SUS). It only delivered hotfixes and patches for Microsoft operating systems. SUS ran on a Windows Server operating system and downloaded updates for the specified versions of Windows from the remote Windows Update site, operated by Microsoft. The clients could then download updates from this internal server. Latest WSUS Available is version of WSUS 3.0 service pack 2.
Automatic Updates client
The Automatic Updates client can download packages from either the public Windows Update site or from a server running SUS. Before installing any packages that have been downloaded, SUS checks to confirm that the package has been signed by Microsoft. If the package is not correctly signed, it will not be installed.
The Automatic Update client also checks the CRC on each package after downloading it to confirm the package was not tampered with.
2.0 Release Candidate
March 22, 2005
2.0 RTW
June 6, 2005
2.0 Service Pack 1
May 31, 2006
Adds support for Windows Vista clients, additional client languages, and using Microsoft SQL Server 2005 as a database backend, as well as performance improvements with the web-based user interface
3.0 beta 2
August 14, 2006
MMC based UI and loads of new features
3.0 Release Candidate
February 12, 2007
3.0 RTW
April 30, 2007
WSUS 3.0 and WSUS Client 3.0 were made available via WSUS on 22 May 2007
3.0 Service Pack 1 Release Candidate
November 1, 2007
3.0 Service Pack 1 RTW
February 7, 2008
3.0 Service Pack 2 RTW
August 25, 2009

WSUS Version 3.0 SP 2

Minimum OS and Application Requirements
Supporting Operating System: Windows 7, Windows Server 2003, Windows Server 2003 Service Pack 1, Windows Server 2008, Windows Vista, Windows Vista Service Pack 1, Windows XP Service Pack 3
  • Microsoft Word or Word Viewer
  • Internet Information Services (IIS) 6.0 or later versions
  • The Microsoft .NET Framework 2.0 or later versions
  • Server component cannot be installed on Windows client OS
  • You must have one of the following supported databases installed:
  • Microsoft SQL Server 2008 Express, Standard, or Enterprise EditionSQL Server 2005 SP2
  • Windows Internal Database
  • If one of the supported versions of SQL Server is not installed, the WSUS 3.0 SP2 Setup Wizard will install Windows Internal Database.
  • Microsoft Management Console 3.0
  • Microsoft Report Viewer Redistributable 2008
  • Windows Server 2008 R2 requires WSUS 3.0 SP2. If you use Windows Server 2008 R2, then you should install WSUS 3.0 SP2. Do not install WSUS 3.0 SP1 on Windows Server 2008 R2.
  • WSUS 3.0 SP2 is not supported for use with Terminal Services on the front-end server in a remote SQL configuration
Integration with Windows Server® 2008 R2
  • Support for the Branch Cache feature on Windows Server 2008 R2
  • Support for Windows 7 clients
WSUS Feature Improvements
Auto-Approval Rules
  • Auto-approval rules now include the ability to specify the approval deadline date and time for all computers or specific computer groups.
Update Files and Languages
  • Improved handling of language selection for downstream servers includes a new warning dialog that appears when you decide to download updates only for specified languages.
Easy Upgrade
  • WSUS 3.0 SP2 can be installed as an in-place upgrade from earlier versions of WSUS and will preserve all of your settings and approvals. The user interface is compatible between WSUS 3.0 SP1 and SP2 on the client and the server.
  • New Update and Computer Status reports provide the ability to filter on updates approved for installation. You can run these reports from the WSUS console or use the API to incorporate this functionality into your own reports.
Software Updates
  • Stability and reliability fixes for the WSUS server, such as support for IPV6 addresses greater than 40 characters.
  • The approval dialog now sorts computer groups alphabetically by group name.
  • Computer status report sorting icons are now functional in x64 environments.
  • A new release of Windows Update Agent is included with WSUS 3.0 SP2 that provides improvements and fixes, such as support for APIs called by non-local system callers in a non-interactive session

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