Download .NET Framework 1.1 Service Pack 1 CLR Security Update for Windows 2000, Windows XP, Windows 2003 Server x64/IA64 and Windows 2003 Server R2 x64/IA64, Windows Vista, Windows Server 2008, Windows 7, Windows Server 2008 R2 from Official Microsoft Download Center

Hands type on a Surface Pro 6 with Type Cover

Surface Pro 6

Stand out from the ordinary

Person using Power BI Desktop

Power BI

Transform data into actionable insights with dashboards and reports

.NET Framework 1.1 Service Pack 1 CLR Security Update for Windows 2000, Windows XP, Windows 2003 Server x64/IA64 and Windows 2003 Server R2 x64/IA64, Windows Vista, Windows Server 2008, Windows 7, Windows Server 2008 R2

Important! Selecting a language below will dynamically change the complete page content to that language.

Select Language:
A security issue has been identified that could allow an attacker to compromise your Windows-based system with the Microsoft .NET Framework 1.1 Service Pack 1.