guard64.dll is considered a type of Dynamic Link Library (DLL) file. Dynamic Link Library files, like guard64.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. Comodo Antivirus) could share the same guard64.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 guard64.dll is attempted to be loaded either when Comodo Antivirus is starting up, or in some cases already running. Some of the most common guard64.dll errors include:
- Access Violation at address - guard64.dll.
- guard64.dll could not be found.
- Cannot find C:\Windows\System32\guard64.dll.
- Cannot register guard64.dll.
- Cannot start Comodo Antivirus. A required component is missing: guard64.dll. Please install Comodo Antivirus again.
- Failed to load guard64.dll.
- The application has failed to start because guard64.dll was not found.
- The file guard64.dll is missing or corrupt.
- This application failed to start because guard64.dll was not found. Re-installing the application may fix this problem.
Your guard64.dll file could be missing due to accidental deletion, uninstalled as a shared file of another program (shared with Comodo Antivirus), or deleted by a malware infection. Furthermore, guard64.dll file corruption could be caused from a power outage when loading Comodo Antivirus, system crash while loading guard64.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.
English
