Copy the ISO to your offline Windows 11 PC (via USB). Double-click the ISO file to mount it as a virtual DVD drive. Note the drive letter (e.g., D: ).
While Windows 11 comes with .NET Framework 4.8 (and newer) pre-installed, version 3.5 (which includes 2.0 and 3.0) is not enabled by default. The most common method to install it is via Windows Features during an active internet connection, but what if your PC is offline, on a restricted network, or the online download keeps failing? .net 3.5 offline installer windows 11
Keep a Windows 11 USB drive handy. With the simple DISM command above, you can enable .NET 3.5 on any offline Windows 11 machine in under five minutes, ensuring your classic applications run smoothly without an internet connection. Have a question about deploying .NET 3.5 across multiple offline machines? Let us know in the comments. Copy the ISO to your offline Windows 11 PC (via USB)