Download Security Update for Microsoft .NET Framework 3.5 on Windows Server 2003 and Windows XP from Official Microsoft Download Center

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NDP20SP1-KB983582-x86.exe Recommended 5.5 MB
NDP20SP1-KB983582-IA64.exe Recommended 15.2 MB
NDP20SP1-KB983582-x64.exe Recommended 12.0 MB
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