Event_manager_er.dll is considered a type of Dynamic Link Library (DLL) file. Dynamic Link Library files, like event_manager_er.dll, are essentially a "guide book" that stores information and instructions for executable (EXE) files - like mighost.exe - to follow. These files were created so that multiple programs (eg. Avast Internet Security) could share the same event_manager_er.dll file, saving valuable memory allocation, therefore making your computer run more efficiently.
Unfortunately, what makes DLL files so convenient and efficient, also makes them extremely vulnerable to problems. If something happens to a shared DLL file, either it goes missing or gets corrupted in some way, it can generate a "runtime" error message. Runtime is pretty self-explanatory; it means that these errors are triggered when event_manager_er.dll is attempted to be loaded either when Avast Internet Security is starting up, or in some cases already running. Some of the most common event_manager_er.dll errors include:
- Access Violation at address - event_manager_er.dll.
- Event_manager_er.dll could not be found.
- Cannot find C:\Program Files\AVAST Software\Avast\event_manager_er.dll.
- Cannot register event_manager_er.dll.
- Cannot start Avast Internet Security. A required component is missing: event_manager_er.dll. Please install Avast Internet Security again.
- Failed to load event_manager_er.dll.
- The application has failed to start because event_manager_er.dll was not found.
- The file event_manager_er.dll is missing or corrupt.
- This application failed to start because event_manager_er.dll was not found. Re-installing the application may fix this problem.
Your event_manager_er.dll file could be missing due to accidental deletion, uninstalled as a shared file of another program (shared with Avast Internet Security), or deleted by a malware infection. Furthermore, event_manager_er.dll file corruption could be caused from a power outage when loading Avast Internet Security, system crash while loading event_manager_er.dll, bad sectors on your storage media (usually your primary hard drive), or quite commonly, a malware infection. Thus, it's critical to make sure your anti-virus is kept up-to-date and scanning regularly.