Windows Security & Updates
Download security updates, service packs, PowerToys, and more for Microsoft Windows.
Get the latest security downloads Visit Microsoft Update
Visit Microsoft Update to get the latest security downloads and more.
Windows 2000 Service Pack 4 Network Install for IT Professionals
Windows 2000 Service Pack 4 (SP4) is a recommended upgrade. Download Windows 2000 Service Pack 4 to obtain updates that can help improve security, application compatibility, operating system reliability, and Setup.
6/26/2003
#83
Windows XP Service Pack 3 - ISO-9660 CD Image File
Windows® XP Service Pack 3 (SP3) includes all previously released updates for the operating system. This update also includes a small number of new functionalities, which do not significantly change customers’ experience with the operating system.
5/6/2008
#84
Windows Malicious Software Removal Tool x64
This tool checks your computer for infection by specific, prevalent malicious software (including Blaster, Sasser, and Mydoom) and helps to remove the infection if it is found. Microsoft will release an updated version of this tool on the second Tuesday of each month.
11/11/2008
#91
Windows XP SP1 Update: Watch TV Shows Recorded by Media Center PCs on Other Windows XP PCs
This supplement is an update to Microsoft® Windows® XP Service Pack 1. Users who want to play Media Center PC digital recording files (.dvr-ms) in any other Windows XP SP1 system should download this update.
1/8/2003
#95
Security Update for Windows 2000 (KB958644)
A security issue has been identified that could allow an unauthenticated remote attacker to compromise your Microsoft Windows-based system and gain control over it.
10/22/2008
#97
Security Update for Windows XP (KB951376)
A security issue has been identified that could allow an unauthenticated remote attacker to compromise your Microsoft Windows-based system and gain control over it.
6/19/2008
#103
Security Update for Windows Journal Viewer (KB886179)
A security issue has been identified that could allow an attacker to compromise a computer running Windows Journal Viewer 1.5 and gain complete control over it.
10/11/2004
#104
Security Update for Windows XP (KB956841)
A security issue has been identified that could allow an authenticated local attacker to compromise your Microsoft Windows-based system and gain control over it.
10/13/2008
#107
Windows Server Update Services 3.0 SP1
Windows Server Update Services 3.0 Service Pack 1 (WSUS 3.0 SP1) delivers updates to corporate environments from Microsoft Update. This release fixes issue found since the release of the product.
2/7/2008
#108
Update Rollup 1 for Windows 2000 SP4 (KB891861)
This update consists of previously released recommended, critical and security updates for Windows 2000, rolled into one convenient package.
9/13/2005
#109
Microsoft Windows Messenger allows real-time communication with other contacts using instant messaging services.
8/12/2008
#110
This accessory enables users who do not have a computer running Microsoft® Windows® XP Tablet PC Edition to view files that were created in Microsoft® Windows® Journal on a Tablet PC.
3/14/2005
#113
The Malware Removal Starter Kit provides tested guidance to help IT Generalists combat malware attacks against small- and medium-sized organizations. Using the Windows Pre-installation Environment (Windows PE) in combination with free anti-malware scanning programs, the kit provides a low-cost, effective strategy that you can use to vanquish malware attacks.
7/10/2007
#115
Windows PowerShell 1.0 English-Language Installation Package for Windows XP (KB926139) 
Microsoft Windows® PowerShell is a new command-line shell and scripting language designed for system administration and automation. Built on the .NET Framework, Windows PowerShell enables IT professionals and developers control and automate the administration of Windows and applications.
6/23/2008
#124
Update for Windows XP (KB927891)
This is a reliability update. This update resolves an issue in the Windows Installer (MSI) that can affect performance during software updates.
5/7/2007
#125
Security Update for Windows XP (KB956803)
A security issue has been identified that could allow an authenticated local attacker to compromise your Microsoft Windows-based system and gain control over it.
10/13/2008
#126
Update for Windows XP (KB951072)
Install this update to resolve an issue that is caused by revised daylight saving time laws in many countries.
8/19/2008
#132
Windows Vista Service Pack 1 Five Language Standalone for x64-based Systems (KB936330)
Windows Vista Service Pack 1 is an update to Windows Vista that addresses key feedback from our customers. SP1 addresses specific reliability and performance issues, supports new types of hardware, and adds support for several emerging standards.
3/18/2008
#133
Service Pack 2 for Windows XP Professional, x64 Edition
Microsoft Windows Server 2003 Service Pack 2 (SP2) is a cumulative service pack that includes the latest updates and provides enhancements to security and stability. This service pack is available for Windows XP Professional, x64 Edition.
3/13/2007
#138
Update for Windows XP (KB894391)
Install this update to address an issue that may cause a "Generic Host Process" error message to be displayed after you install security update MS05-012, or cause attachment file names not to be displayed in Rich Text e-mail messages
5/18/2005
#143
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