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)
If your offline installation fails, it is usually tied to conflicting system configurations or mismatched installation media versions. Error Code 0x800F0906 or 0x800F081F
: Press Enter . The progress bar will advance to 100%. Once completed, you will see the message: "The operation completed successfully." Double-check your DISM command drive letter
When prompted on how you want to download the files, select . Troubleshooting Common Installation Errors
To install, simply right-click your newly created file and choose Run as administrator . Group Policy Restrictions (Enterprise PCs) If your offline
This issue often surfaces when your system configuration blocks the internal Windows Update frameworks from executing background verification tasks.
Microsoft stores the exact deployment payload for .NET 3.5 inside a specific directory on these disks. You do not need to download sketchy executable files from third-party websites. Step 1: Mount Your Windows ISO File Once completed, you will see the message: "The
Save the file with a .bat extension, for example, install_dotnet35.bat .
Place this .bat file in the same folder as your NetFx3.cab file.