The DLL and SYS files do not necessarily have the same version for each engine. File names may differ between 32-bit and 64-bit systems.
The version number can be checked by right-clicking on the file > Properties > Version > Product Version or by adding a column for Product Version. An example:
Technical Information Symantec Endpoint Protection contains an AV Scan Engine and an Eraser Engine to provide detection and side effects repair for threats found in the environment. Updates to each of these engines are released via definition update packages (typically, via LiveUpdate): there is no separate manual installation necessary. AV Engine and Eraser releases are scheduled on a quarterly basis with maintenance updates released as needed. A reboot is not usually required for AV Engine or Eraser Engines to be applied.
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