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