The a4s2_s.dll error message pertains to a version of the SFC MFG Application running on your computer. Seeing a message like this which contains a Dynamic Link Library (DLL) file may mean that your computer’s registry has encountered a missing or damaged file, or you may be dealing with some form of virus or spyware.
To rule out the latter, you must establish where a4s2_s.dll is running from on your PC. Doing this requires some skill and technical knowledge and some steps that even computer repair professionals do not bother to take; instead, they rely on scans and competent registry cleaners.
Clicking below will take you to a free scan that will isolate all of the errors on your computer. Often, DLL errors signify multiple registry issues, so don’t be surprised if you have more than one error on your system. Once you establish that you are dealing with registry-related errors, you can install ZookaWare PC Cleaner to fix current errors and prevent future ones.