Norton Antivirus Rapid Release definition update
File type: Various data file
A TRZ file is a Rapid Release virus-definition update file used by Norton Antivirus.
It contains data that helps Norton Antivirus detect and protect against malware.
File type category:
Various data file
Date updated: November 4, 2026
The TRZ file extension is associated with Norton Antivirus for Microsoft Windows, the antivirus software historically developed by Symantec. Rapid Release updates provide newly issued malware definitions between regular definition updates.
A TRZ file is an internal update package used by Norton Antivirus. It is not a document intended for direct viewing or editing, and its contents are handled by the antivirus software's update system. Its use is tied to Norton Antivirus update distribution rather than normal user-created files.
TRZ files should be handled by the compatible Norton Antivirus installation on Microsoft Windows. Norton normally downloads and processes definition updates through its built-in update mechanism.
There is no useful general-purpose application for opening a TRZ file manually. Do not rename it or edit its contents; if Norton does not recognize it, use the software's update or repair functions instead.
A TRZ file cannot be meaningfully converted to another standard file format. Its contents are proprietary malware-definition data intended for Norton Antivirus.
To obtain the definitions in another form, use the antivirus product's supported update process rather than a file-conversion tool.
Software applications that handle other tasks involving trz files:
Microsoft Windows
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