ZoneAlarm Mailsafe renamed PRF file
File type: Various data file
A zm4 file extension is related to the ZoneAlarm Mailsafe, a software for detects dangerous e-mail attachments, A zlc files are renamed PRF Windows system files.
Found 2 different file type records with the same zm4 filename suffix.
File type category:
Various data file
Date updated: October 12, 2017
The ZM4 file extension is associated with ZoneAlarm, a personal firewall software, originally created by Zone Labs and currently developed by CheckPoint Software Technologies LTD.
One of ZoneAlarm features is MailSafe, which detects e-mail attachments and warns the user about their presence. When a potentially dangerous attachment is detected, the program quarantines the file with simple renaming of its original file extension, so it breaks the common program association function in Windows and prevents such files from being executed (or launched via associated program).
A file with ZM4 file extension originally had PRF file extension (most likely Windows system file) Simple renaming will restore the Windows associations with such file, however it is not advised, unless you are absolutely sure it safe to do.
You can rename the ZM4 file extension back to PRF and work with the file normally. This can however be potentially dangerous, because the file was quarantined for a reason. So always re-check it with your anti-virus or anti-spyware programs before you rename the files.
Software applications that handle other tasks involving zm4 files:
Microsoft Windows
File type category:
Emulator file
Date updated: September 27, 2026
ZSNES uses numbered movie files to record gameplay input and timing. A .zm4 file represents movie slot 4 and can be replayed by ZSNES.
The file belongs to ZSNES, an emulator for Super Nintendo games available on Microsoft Windows. Because it records input for an emulated game, it generally depends on the corresponding game and suitable ZSNES settings for accurate playback.
The format is specific to ZSNES and is not a general-purpose video format. It is mainly encountered with existing ZSNES recordings.
Open the .zm4 file in ZSNES on Microsoft Windows. Use ZSNES's movie playback or movie-loading function to select the file.
The recording may require the game used to create it and compatible emulator settings to play correctly.
A .zm4 file cannot normally be converted directly into a standard video format because it contains recorded emulator input, not video frames.
To create a video, play the movie in ZSNES and record the emulator window with screen-recording software. This produces a separate video while leaving the original movie file unchanged.
Software applications that handle other tasks involving zm4 files:
Microsoft Windows
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