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If the installer says it’s already there but your app won't run, the installation might be corrupted.
If you try to run an older game or utility and get an error saying "An app on your PC needs the following Windows feature: .NET Framework 3.5," don't go to a website. It's already on your computer—it’s just turned off. .net framework install
Microsoft frequently pushes .NET Framework updates through Windows Update. Go to Settings > Update & Security > Check for updates . If the installer says it’s already there but
If you prefer using the terminal or need to script the installation, is the fastest way: To install .NET Framework 4.8: powershell winget install Microsoft.DotNet.Framework.4.8 Use code with caution. Microsoft frequently pushes
For most users on Windows 10 or 11, .NET Framework 4.8 is already present. If an app fails to start, your first step should be enabling via the "Windows Features" menu. If that fails, the Official Runtime Installer from Microsoft is your safest bet.
Open the and type "Turn Windows features on or off."