Norton CleanSweep installation log
File type: Various data file
An iil file is an installation log used by Norton CleanSweep on Microsoft Windows.
CleanSweep uses this log to record information about software removal and uninstallation activity.
File type category:
Various data file
Date updated: October 11, 2026
Norton CleanSweep was a Symantec utility for Microsoft Windows that helped users remove installed software and its associated files. The iil file extension identifies an internal CleanSweep installation log.
The iil file contains log information about software removal and uninstallation processes performed by CleanSweep. Related Norton SystemWorks and Norton Utilities products also supported CleanSweep on Microsoft Windows.
CleanSweep and this log format are legacy technology and are not generally used by current Windows software.
Open an iil file with Norton CleanSweep on Microsoft Windows. The file is an internal log, so it may not open as a readable document in a text editor.
Because CleanSweep is legacy software, a current Windows system may not be able to open the file. Do not edit the original if it is still needed by an existing CleanSweep installation.
An iil file has no useful general-purpose conversion format. It is an internal Norton CleanSweep log rather than a document intended for export.
If the recorded installation or removal information is needed, use CleanSweep itself on a compatible Microsoft Windows system. Otherwise, retain the original file as legacy application data.
Software applications that handle other tasks involving iil files:
Microsoft Windows
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