Symantec Antivirus check file
File type: Various data file
A QSFL file is an internal check file associated with Symantec Antivirus.
It is created and used by the antivirus software rather than intended as a document for direct user access.
File type category:
Various data file
Date updated: September 28, 2026
Symantec Antivirus, developed by Symantec, uses the QSFL file extension for files that support its checking operations. The file contains information used by the software when it performs or records an antivirus check.
A QSFL file is part of the antivirus application's internal data and is normally managed automatically by Symantec Antivirus. The format is not intended for exchanging data with other applications.
A QSFL file is normally managed automatically by Symantec Antivirus rather than opened directly by the user. If the file belongs to an installed Symantec Antivirus installation, leave it in its original location and let the antivirus software process it.
Opening the file directly in a text editor or another unrelated program will not provide useful information.
A QSFL file is an internal Symantec Antivirus check file, not a document or interchange format. It cannot be meaningfully converted with a standard file converter.
When equivalent information is needed, use the reporting or export features provided by Symantec Antivirus rather than converting the QSFL file itself.
Language