troupbleshooting .dll error

[buddha5995]

when i install .dll file this massage appear:

C:/windown/systerm32/MFC42u.dll is either not designed to run on Windown or it contains an error. Try installing the program again using the original installation media or contact your systerm administrator of the software vendor for support

How can i fix it?
Thank you.

[Kasey00]

This is particularly common with anti-malware software. However, if a 32-bit DLL is loaded with a 64-bit process, the operating system throws a warning.