Backup for Files -Side by side manifest errors in the windows event log

Written By Tami Sutcliffe (Super Administrator)

Updated at March 31st, 2021


The software appears to work correctly, but the Windows System Event Log has side-by-side (SxS) activation errors similar to the following:

General activation context failed for ...\MFC80.DLL (The referenced assembly is not installed on your system.)
Resolve Partial Assembly failed for Microsoft.VC80.MFCLOC. (The referenced assembly is not installed on your system.)


Certain system configuration can cause these errors to appear in your system log. Although they are harmless and will not affect the operation of the software, you should be able to eliminate these messages by installing certain Microsoft redistributable components. These components are packaged as an MSI file and can be deployed to many desktops all at once. Please download and install the correct package for your target platform:

  • Supported Operating System
    Windows 64-bit (x64)
  • Applies to: Windows 2000, Windows 7, Windows Server 2003, Windows Server 2008, Windows Server 2008 R2, Windows Vista, Windows XP