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