Often, the standard online installation fails due to "Error 0x800F0954" or lack of internet access. This guide provides the most reliable methods to install the .NET Framework 3.5 offline on Windows 11 64-bit.
Simply run the .exe as an Administrator and click Install . Troubleshooting Common Errors Error 0x800F0954
Right-click "Command Prompt" and select .
Dism /online /enable-feature /featurename:NetFX3 /All /Source:X:\sources\sxs /LimitAccess