Solve Your Dec2cab.dll Problems

The dec2cab.dll file is the file decomposer component of the Norton Security Center. There are many file decomposers associated with Norton one for each of the type of compressed files that it is going to disassemble or decompose. The dec2cab.dll file is the decomposer library for Windows cabinet files (file extension .cab).

The dec2cab.dll module is a component called by the Symantec Anti Virus Decomposer Engine which carries out the scanning of compressed / archived files for malicious content.

Symantec Anti Virus is an anti virus scan engine employed in numerous anti virus products including Norton Anti Virus, Mail Security, Web Security, and many others. Symantec Anti Virus aids standard file scanning and real-time file scanning, even on compressed / archived files.

The term ‘file decomposer’ stands for a program that breaks down the archived content of a Windows cabinet file to a format recognizable by the Anti Virus software and calls the virus scanner to look into the broken down contents for any changes or modifications of the original.

On older versions of Symantec Anti Virus software like Norton Anti Virus 2002, an error may sometimes occur when the dec2cab.dll module is called due to the fact that the CAB compressed file may possibly be protected by a password or corrupted which presents a problem to the decomposer when scanning compressed files.

The solution was that you had to turn the scanning option of compressed files on the Anti Virus software to ‘Auto Protect’ mode and it would not be a security risk anymore since the Anti Virus would still scan again after the compressed files are opened. The problem was somehow fixed on newer versions of the dec2cab.dll module.

Dec2cab.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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