Odd MSAV Behavior when CHKLIST.MS Files Are Read-Only (101560)
The information in this article applies to:
• Microsoft MS-DOS operating system 6.0
• Microsoft MS-DOS operating system 6.2
• Microsoft MS-DOS operating system 6.21
• Microsoft MS-DOS operating system 6.22
This article was previously published under Q101560
By default, Microsoft Anti-Virus and Microsoft Anti-Virus for Windows
store a CHKLIST.MS file (marked with the Archive file attribute) in
each directory they scan. If the CHKLIST.MS file has a Read-Only,
System, or Hidden file attribute, certain Anti-Virus functions do not
When a file (such as CONFIG.SYS) changes, Anti-Virus detects the
change and asks to update the file. If the file has a Read-Only,
System, or Hidden attribute, Anti-Virus does not update the CHKLIST.MS
file even if you choose to update it.
This problem also occurs on network drives when you do not have write
privileges to a directory Anti-Virus is scanning.
If the CHKLIST.MS files have the Read-Only attribute set when you
choose Delete CHKLIST Files, the files are not deleted; however,
Microsoft Anti-Virus gives no indication that the files were not
deleted. System and Hidden attributes have no effect on this process.
To work around this problem, remove any Read-Only, Hidden, or System
file attributes from the CHKLIST.MS files. If you are scanning a
network drive, you must have write privileges to all directories
scanned by Anti-Virus.
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