I also posted on the CommVault Forum and almost immediately received the following kind reply “I don’t think this is the right way for an antivirus to change the timestamps on a file. This will affect the backups as well since backups depend on modifications time of a file and if that changes, there is a chance that we could skip files from backup or backup extra data. The anomaly report is also pointing to the same that there is some anomaly happening on the machine. I don’t think CommVault can do anything here unless the antivirus fixes itself to not modify the timestamp.”