Opening EFW Files

The EFW file type is primarily associated with CA Security Centre.

EFW	File extension: EFW
	File type:	renamed compressed file or executable file

What is an EFW file?

EFW files mostly belong to CA Security Centre by Computer Associates. EFW files are created by CA Security Center, which renames an original file to use the EFW extension.

Main usage: CA Security Center renames files that it determines to be a security risk to use the EFW file extension. This is done to prevent the user from running a potentially malicious program. The EFW file format is identical to the file it overwrites, the only difference between the original and new files is the file extension. For this reason, the file can be easily converted back to the original file by renaming it to use the original file extension (e.g. ZIP, EXE, etc.). Though the EFW file extension doesn't convey any information about the original extension, this can be determined by comparing the first bytes of the EFW file to that of a known file extension, which is possible using a text editor such as Notepad.
Support: CA Security Center is a security program for Windows. The program contained an anti-virus and a personal firewall designed to improve the security of a computer.

How to open EFW files

You need a suitable software like CA Security Centre to open an EFW file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your EFW file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a EFW file directly in the browser:. Just drag the file onto this browser window and drop it.

Online EFW Text Viewer

Choose your .efw file to analyze

or drag and drop it here

Online File Viewer

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Programs that open and convert EFW files:

CA Security Centre by Computer Associates
See the previous paragraphs to learn more about the main application. EFW files are often referred to as CA Security Centre compresseds because this type of file is primarily created or used by this software.
WinZip (renamed compressed file or executable file) by Corel
Antivirus software programs like Computer Associates rename extensions of archived or executable files which come as email attachments as EFW. If it is an archived file, it can be opened using WinZip after changing the extension to ZIP. In case you wish to avoid downloading files with EFW extensions, you could disable your antivirus settings when downloading files from genuine sources. This file format is classified as Compressed. Related links: WinZip Wikipedia page

Technical Data for EFW File Extension

File classification:

Compressed

Related files:

rnd, sep, pgp

Related links:

7-Zip Utility

an efw renamed compressed file or executable file is a special file format by Computer Associates and should only be edited and saved with the appropriate software.

How to solve problems with EFW files

Associate the EFW file extension with the correct application.
Update your software that should actually open renamed compressed file or executable files. Because only the current version supports the latest EFW file format. Search, therefore, e.g. on the Computer Associates manufacturer website after an available CA Security Centre update.
To make sure that your EFW file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .EFW file online - secure, fast, and no downloads needed.