The file s32guif.dll is a Symantec Custom Control Library from Symantec Corporation. This file is a part of the Symantec Core Technology, and may be used with different Symantec products, including the Norton line of applications. This dynamic link library file contains code and other instructions that those applications can call up when needed and share with other programs in their suite.
If you see an error with this file, you may need to clean your registry as it could impact any of the Symantec products active on your computer. When you get a dll file error, don’t despair. The problem is almost always going to be with the registry database that tracks all the files on your machine. Windows uses the registry to find and run files, so a mistake in the registry means your programs won’t run properly if at all.