Net Framework 3.5 Windows 10 64 Bit Offline Installer | !!install!! Download
Enable-WindowsOptionalFeature -Online -FeatureName "NetFx3" -All -LimitAccess -Source "X:\sources\sxs"
: Type the following command, replacing D: with your actual drive letter, and press Enter : DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:D:\sources\sxs . Alternative: Official Download Links (Online Requirement)
: On modern Windows 10 versions, even this package may sometimes request a connection to "download and install this feature" during setup. The DISM method above is more guaranteed for strictly offline environments. Important Considerations Install .NET Framework 3.5 on Windows 10 - Microsoft Learn