[ Windows ISO / USB ] │ ▼ (Mount to Drive Letter, e.g., D:) [ Command Prompt (Admin) ] ───► Run DISM Deployment Command │ ▼ [ .NET 3.5 Fully Enabled ] Steps to Use the DISM Command
Press . A progress bar will appear in the command prompt. Within two to three minutes, you should see the message: "The operation completed successfully."
Click . Windows will search for the files and activate the framework. Troubleshooting Common Installation Errors Error Code 0x800F0906
Instead, the official offline source is your (ISO file or USB drive). The framework components are hidden inside the \sources\sxs folder. [ Windows ISO / USB ] │ ▼ (Mount to Drive Letter, e
Check the box next to it. Leave the nested child options unchecked unless your specific application documentation instructs otherwise.
Here is the text you can use for a guide or webpage on downloading the for Windows 10 and 11 for free.
Only get .NET 3.5 from Microsoft (via ISO) or from your original Windows installation media. Windows will search for the files and activate the framework
Microsoft provides a standalone bootstrapper/runtime package package for developers and system administrators. Step-by-Step Installation:
If you are preparing an offline installer package on an internet-connected computer to deploy later on an offline PC, you should only use official Microsoft distribution channels. Avoid third-party websites offering standalone .exe installers, as they may bundle malware or outdated files. Visit the official Microsoft .NET Framework download page. Select . Download the runtime installer package ( dotnetfx35.exe ).
) often fail or require an internet connection to "verify" the installation. Microsoft Learn Check the box next to it
If you run into any system errors during this process, let me know: What did Windows display? Do you have access to a Windows installation ISO or USB ? Which Windows version (10 or 11) are you currently running?
Double-check your DISM command drive letter. Ensure that the version of the ISO you mounted matches your installed operating system exactly. (e.g., Do not use a Windows 10 ISO source folder to install .NET 3.5 on a Windows 11 machine). Group Policy Restrictions (Enterprise PCs)