Before running the engine, you must install necessary dependencies like DirectX, Visual C++ Redistributables, and .NET Framework. These can often be found in the Engine/Extras/Redist folder within your copied UE4 directory.
If you don't have an enterprise account, you can create your own "offline installer" by utilizing a portable copy of the engine. This is the most popular method for individual developers. download unreal engine 4.27 offline installer
If your organization has purchased Unreal Subscription seats, administrators can download standalone installers directly from the Epic Developer Portal. Before running the engine, you must install necessary
Copy the folder onto your offline machine. Before running the engine
Navigate to the installation directory (usually C:\Program Files\Epic Games\UE_4.27 ) and copy the entire folder to an external hard drive or USB flash drive.