ldmff.dll is considered a type of Dynamic Link Library (DLL) file. Dynamic Link Library files, like ldmff.dll, are essentially a "guide book" that stores information and instructions for executable (EXE) files - like MpSigStub.exe - to follow. These files were created so that multiple programs (eg. Light Downloader) could share the same ldmff.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 ldmff.dll is attempted to be loaded either when Light Downloader is starting up, or in some cases already running. Some of the most common ldmff.dll errors include:
- Access Violation at address - ldmff.dll.
- ldmff.dll could not be found.
- Cannot find C:\Program Files (x86)\Light Downloader\Firefox\extension\components\ldmff.dll.
- Cannot register ldmff.dll.
- Cannot start Light Downloader. A required component is missing: ldmff.dll. Please install Light Downloader again.
- Failed to load ldmff.dll.
- The application has failed to start because ldmff.dll was not found.
- The file ldmff.dll is missing or corrupt.
- This application failed to start because ldmff.dll was not found. Re-installing the application may fix this problem.
Your ldmff.dll file could be missing due to accidental deletion, uninstalled as a shared file of another program (shared with Light Downloader), or deleted by a malware infection. Furthermore, ldmff.dll file corruption could be caused from a power outage when loading Light Downloader, system crash while loading ldmff.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.