Right-click the Start button and select or Command Prompt (Admin) .

The easiest first step is using the built-in diagnostic tools provided by Microsoft. Press the Windows Key and type Troubleshoot Settings. Navigate to Other troubleshooters. Find Windows Update and click Run. Follow the on-screen prompts and restart your computer. Method 2: Enable .NET Framework via Windows Features

Have a unique variation of this error? Describe your setup in the comments below. For official Microsoft support, visit support.microsoft.com (always free).

Now try installing .NET Framework again.

Once finished, try to install your feature again using: Dism /online /enable-feature /featurename:NetFx3 /All Method 4: Modify Group Policy Settings