PC.net

.efw

File Type Generic IconRenamed Zip or Executable File
File Format Proprietary (Computer Associates)
Usage Open manually
Popularity ★ ★ ★ ☆ ☆  Average
Description

Compressed .ZIP or executable .EXE file renamed by CA Security Centre to have a ".efw" extension; typically applies to e-mail attachments scanned by Computer Associates (CA) antivirus software.

EFW zipped files may be opened by changing the file extension to ".zip" and opening the file with a decompression utility, such as WinZip or Stuffit Expander. Executable files may be run directly by changing the file extension to ".exe" and opening the file.

Important: Do not open unknown e-mail attachments from non-trusted sources, as they may contain viruses or other malicious programs.

You can prevent EFW files from being created by temporarily disabling your antivirus software when downloading legitimate zipped or executable files.

Open With
Windows

IconCorel WinZip

IconPKZip

IconSmith Micro StuffIt Deluxe

macOS

IconSmith Micro StuffIt Deluxe Mac

Unix

Iconunzip

Iconfunzip

Iconp7zip

Updated 2007
Information from the PC File Extensions Reference
https://pc.net/extensions/file/efw
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