Go to Control Panel > Programs and Features > Turn Windows features on or off – uncheck .NET Framework 4.8 . For a full clean removal, use the dotnetfx_cleanup_tool (but only as a last resort).

When you're setting up a computer without an active internet connection or deploying to multiple machines across a network, the standard web installer isn't always the best choice. For these scenarios, the .NET Framework 4.8.1 offline installer is the official solution . Why Use the Offline Installer?

Avoids installation failures caused by unstable network connections [6].

This extracts the internal .cab and .msu files to a folder called extracted_files .

Do not download installers from third-party "download aggregator" sites. They often bundle malware, adware, or outdated components. Always use Microsoft's official download center .