High Quality Content by WIKIPEDIA articles! In computing, DLL Hell is a term for the complications that arise when working with dynamic link libraries (DLLs) used with Microsoft Windows operating systems, particularly legacy 16-bit editions which all run in a single memory space. While the phrase is Windows-specific and a derivation of the general cross-platform phrase "dependency hell", the rhyme "DLL hell" makes its use popular for discussing a general Windows-related dependency hell case.