Solution For Dec2id.dll Error Problems

The dec2id.dll file contains a file decomposer component of the Norton Anti Virus and Security Center software. It is a component called by the Symantec Anti Virus Decomposer Engine which carries out the scanning of compressed / archived files for malicious content.

The job of the dec2id.dll module is to open a particular container of compressed files and then pass the parsed contents like raw data, text, or binaries at the lowest level of decomposition to the scan engine. It is the scan engine that can detect the presence of a virus. The dec2id.dll file does not perform the scan but simply opens the container file.

The Symantec Anti Virus software is a security utility that protects the system from the entrance of malicious content like viruses, spy ware, Trojans, worms, etc. The dec2id.dll module is employed in several anti virus products from Symantec like Norton Anti Virus, Mail Security, Web Security, and many others.

The dec2id.dll file is an aid for standard file scanning and real-time file scanning on compressed / archived files.

The dec2id.dll module decomposes a file, meaning; it breaks down the archived content of a Windows cabinet file to a more recognizable format by the Anti Virus software. It then calls the scanner after parsing a file to look into the broken down content for any changes or modifications to the original.

On several older versions of Symantec Anti Virus software (e.g., Norton Anti Virus 2002), a fault may sometimes occur in the software API when the dec2id.dll module is called. It may be caused by a possibly password protected or corrupted file which presents a problem to the decomposer when scanning compressed files.

The resolution was turning off the scanning within the archived files on Auto Protect mode of the Anti Virus software. Turning the function off would not be a security risk because the Anti Virus will scan the again after the opening the compressed files. On newer versions of the dec2id.dll module the problem was fixed however.

Dec2id.dll is created by:
Symantec Corporation
Symantec Support Site

Known file path:
C:\ Program Files\ Symantec Client Security\ Symantec Antivirus\, C:\ Program Files\ Common Files\ Symantec Shared\ Decomposers\

What is a DLL?

Your operating system comes pre-installed with Microsoft DLL’s and most third party programs also install DLL’s.

DLL (Dynamic Link Library) is Microsoft’s implementation of the shared library concept. Meaning there’s a DLL library on your computer and each DLL can be shared among different Microsoft and third party programs. This shared library method helps your computer run faster by having fewer operations running at the same time.

When a DLL is missing or corrupt it may show an error message and programs may fail or crash.

Because DLL’s are shared, one missing or corrupt DLL may affect multiple programs on your computer.

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