Architecture Mismatch: Trying to install a 64-bit version on a 32-bit OS will result in an immediate error.

Unlike the web launcher (a 2-3 MB file that downloads components during installation), the contains the full set of .cab and .exe files required to install IE11. This file typically ranges from 50 MB to 120 MB depending on the target architecture (x86, x64, or IA64) and Windows version.

You cannot run the IE11 offline installer on a fresh Windows 7 SP1 machine. It will fail with a "Prerequisites not installed" error. Before running the main IE11 offline installer, you must apply four specific updates (also available offline via MSU files):

The offline installer is useful for air-gapped systems or environments with restricted connectivity. Cons: