Sometimes, depending on the complexity of the program, the keygen comes packaged with one or more DLL or EXE files with the intention that they're written over the legitimate, original files so that the keygen will work properly.
Mgbe ụfọdụ, dabere na mgbagwoju nke usoro ihe omume ahụ, keygen na-abịa na otu ma ọ bụ karịa DLL ma ọ bụ EXE faịlụ na ebumnuche na edere ha na ihe ndị ziri ezi, nke mbụ faịlụ ka keygen ga-arụ ọrụ nke ọma.