Restart the via services.msc and rerun the DISM command from Method 1.
: Visit the official Microsoft Download Center on a connected device. Search for the ".NET Framework 3.5 Service Pack 1 (Full Package)".
To help resolve any issues with your setup, please let me know:
Insert your bootable Windows 10 64-bit USB drive, or double-click your Windows 10 ISO file to mount it. Net Framework 3.5 Offline Installer Windows 10 64 Bit
Double-click your Windows 10 ISO file to mount it as a virtual drive. Alternatively, plug in your Windows 10 installation USB.
Navigate to: HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU
No. The recovery drive does not contain the sxs folder. You must use a full Windows 10 64-bit installation media. Restart the via services
Download the .NET Framework 3.5 Service Pack 1 (Bootstrapper/Standalone Installer).
For system administrators deploying .NET 3.5 across multiple offline workstations, creating a reusable batch file simplifies the process.
Normally, Windows 10 attempts to download .NET 3.5 files automatically through Windows Update when an app requests it. However, an offline installer is necessary if you encounter the following scenarios: To help resolve any issues with your setup,
You should see a file named microsoft-windows-netfx3-ondemand-package~31bf3856ad364e35~amd64~~.cab . This .cab archive contains the complete 64-bit installer payload. Step 3: Run the DISM Command
If you’ve tried running an older application or game on Windows 10 only to be stopped by a prompt for , you’re not alone. While Windows 10 comes with newer versions pre-installed, many legacy programs still rely on this specific "engine" to function.
Open the mounted drive or USB folder and navigate to the following path: [Your Drive Letter]:\sources\sxs Ensure that you see a file named . This specific CAB file is the offline installer payload for 64-bit systems. 3. Open Command Prompt as Administrator Press the Windows Key , type cmd .
While the technical execution of the offline installer is straightforward—often requiring a single command in an elevated Command Prompt—users must exercise caution regarding the source of the files. The safest source is always an official Windows 10 ISO downloaded directly from Microsoft. Third-party websites often offer "standalone installers" repackaged as executable files, but these pose a significant security risk. Malicious actors frequently inject malware into these redistributables, targeting users who are desperate to get their legacy software running. Therefore, the true "offline installer" for a prudent Windows 10 user is not a separate download, but the installation media they likely already possess.