Net Framework 3.5 May 2026

The 3.5 binaries are still on the original media, just not installed by default.

✅ Many older apps will break without it. ✅ SQL Server 2008-2014 Support: If you haven't migrated legacy DBs, you need this. ✅ In-Place Upgrade: Windows 10/11 can run 3.5 side-by-side with modern .NET. net framework 3.5

dism /online /enable-feature /featurename:NetFX3 /all /source:D:\sources\sxs /LimitAccess net framework 3.5

Get-WindowsOptionalFeature -Online -FeatureName NetFx3 net framework 3.5

Don't let a missing 3.5 framework crash your legacy app on new hardware. Plan ahead.

You don't need internet access. Use your Windows installation media.

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