.EFW File

The efw file extension is used for a compressed ZIP or executable EXE file renamed by CA Security Centre.

Typically applies to e-mail attachments scanned by Computer Associates (CA) antivirus software.

Files with efw file extension are commonly used by CA Security Center for some sort of compressed archive. It's basically a renamed ZIP file.

How to open:

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

How to convert:

Probably cannot be converted to anything else.