DavidR
3
You don’t mention what type of on-demand scan you are doing ?
Quick/Standard sensitivity, with or without Archives, etc. or your system specs, these things are more likely to slow the scan.
You don’t mention anything about the makeup of that 42GB, I suspect a large number of media files, and some of those not considered a risk could be excluded from the scan, either by file type or by excluding your Media folder.