Certain backup and indexing software use the 'Change Journal' or 'Update Sequence Number (USN) change journal' to determine which files need to be backed up:
This can affect certain backup and indexing software that uses the USN change journal, as any file or files accessed by Sophos Anti-Virus can trigger a backup or re-index.
First seen in Sophos Anti-Virus for Windows 2000+
Sophos Anti-Virus, prior to version 10.3 resets the "last time/date modified" value on a file, which is recorded in the USN change journal as a reset.
To prevent the alteration of the 'last time/date modified' value a registry value can be applied:
The default value used by Sophos when this registry entry is not set is 1 - update last time stamp.
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