js64u.dll is considered a type of Dynamic Link Library (DLL) file. Dynamic Link Library files, like js64u.dll, are essentially a "guide book" that stores information and instructions for executable (EXE) files - like AddinSetupTool.exe - to follow. These files were created so that multiple programs (eg. Nitro Pro) could share the same js64u.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 js64u.dll is attempted to be loaded either when Nitro Pro is starting up, or in some cases already running. Some of the most common js64u.dll errors include:
- Access Violation at address - js64u.dll.
- js64u.dll could not be found.
- Cannot find C:\Program Files\Nitro\Pro\13\js64u.dll.
- Cannot register js64u.dll.
- Cannot start Nitro Pro. A required component is missing: js64u.dll. Please install Nitro Pro again.
- Failed to load js64u.dll.
- The application has failed to start because js64u.dll was not found.
- The file js64u.dll is missing or corrupt.
- This application failed to start because js64u.dll was not found. Re-installing the application may fix this problem.
Your js64u.dll file could be missing due to accidental deletion, uninstalled as a shared file of another program (shared with Nitro Pro), or deleted by a malware infection. Furthermore, js64u.dll file corruption could be caused from a power outage when loading Nitro Pro, system crash while loading js64u.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.
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