Security updates & tools

Help protect your PC with Microsoft Security Essentials.
Microsoft Security Essentials
Get the latest updates for your PC at Microsoft Update.
Microsoft Update
Get the latest tools, updates, and tips at Microsoft Safety & Security Center.
Microsoft Safety & Security Center
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Security Patch
Security Patch
A security issue has been identified in a Microsoft software product that could affect your system.
FREE
Release Date:
04/08/2013
Security Patch
Security Patch
A security issue has been identified that could allow an attacker to remotely compromise your Windows-based system using the Windows Media Player Plug-in and gain control over it.
FREE
Release Date:
02/13/2006
Security Patch
Security Patch
A security issue has been identified that could allow an authenticated local attacker to compromise your system and gain control over it.
FREE
Release Date:
05/07/2012
Security Patch
Security Patch
A security issue has been identified in a Microsoft software product that could affect your system.
FREE
Release Date:
04/08/2013
Security Patch
Security Patch
A security issue has been identified that could allow an unauthenticated remote attacker to compromise your system and gain control over it.
FREE
Release Date:
03/07/2011
Security Patch
Security Patch
A security issue has been identified in a Microsoft software product that could affect your system.
FREE
Release Date:
04/08/2013
Security Patch
Security Patch
A security issue has been identified in a Microsoft software product that could affect your system.
FREE
Release Date:
04/08/2013
Security Patch
Security Patch
This update addresses the vulnerability addressed in the Microsoft Windows Security Bulletin MS03-041. To find out if more recent security updates are available for you, see the Overview section of this page.
FREE
Release Date:
10/14/2003
Update
Update
Hotfixes and Security Updates in Windows Server 2008 SP2 and Windows Vista SP2
FREE
Release Date:
08/14/2009
Document
Document
Microsoft Security Update Guide, Second Edition: Helping IT Professionals Better Understand and Maximize Microsoft Security Update Release Information, Processes, Communications, and Tools.
FREE
Release Date:
06/20/2011
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