Interop.WindowsInstaller.dll is considered a type of Dynamic Link Library (DLL) file. Dynamic Link Library files, like Interop.WindowsInstaller.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. Drivers For Free) could share the same Interop.WindowsInstaller.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 Interop.WindowsInstaller.dll is attempted to be loaded either when Drivers For Free is starting up, or in some cases already running. Some of the most common Interop.WindowsInstaller.dll errors include:
- Access Violation at address - Interop.WindowsInstaller.dll.
- Interop.WindowsInstaller.dll could not be found.
- Cannot find C:\Program Files (x86)\Drivers For Free\Drivers For Free\Interop.WindowsInstaller.dll.
- Cannot register Interop.WindowsInstaller.dll.
- Cannot start Drivers For Free. A required component is missing: Interop.WindowsInstaller.dll. Please install Drivers For Free again.
- Failed to load Interop.WindowsInstaller.dll.
- The application has failed to start because Interop.WindowsInstaller.dll was not found.
- The file Interop.WindowsInstaller.dll is missing or corrupt.
- This application failed to start because Interop.WindowsInstaller.dll was not found. Re-installing the application may fix this problem.
Your Interop.WindowsInstaller.dll file could be missing due to accidental deletion, uninstalled as a shared file of another program (shared with Drivers For Free), or deleted by a malware infection. Furthermore, Interop.WindowsInstaller.dll file corruption could be caused from a power outage when loading Drivers For Free, system crash while loading Interop.WindowsInstaller.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.