Download !free! .net Framework 3.5 Offline Installer For Windows 10 11 -

If you are currently online but need an installer to take to a different, offline machine, Microsoft provides a "full package" (Service Pack 1) that acts as a standalone installer. Install .NET Framework 3.5 on Windows 10 - Microsoft Learn

Microsoft does offer a small bootstrapper file (~2 MB) named dotnetfx35.exe (for Windows 7/8 era). This bootstrapper attempts to download files from the internet. If you run it on Windows 11, it will often fail with error code 0x800F081F because it does not recognize the new OS. If you are currently online but need an

Press Win + X and select Terminal (Admin) or Command Prompt (Admin) . If you run it on Windows 11, it

For users who need to install this on multiple computers or have no internet access, the official offline installer is the best method. Even with an offline installer, things can go wrong

Even with an offline installer, things can go wrong. Here is how to fix the most frequent errors.