DLL Hell is a term for the complications that arise when working with dynamic link libraries (DLLs) used with Microsoft Windows operating systems,[1] particularly legacy 16-bit editions which all run in a single memory space.
Side-by-side technology is a standard for executable files in Windows 98 Second Edition, Windows 2000, and later versions of Windows that attempts to alleviate problems that arise from the use of dynamic-link libraries in Microsoft Windows.