The scan analyzed only 14,000 files out of 595,000. At the same time, Sophos home edition scanned the whole hard disk.
Good point. I also did a complete disk scan (1.8 million files) that took more than 8 hours. It would likely have been much shorter if I had unchecked the "Scan archives and Compressed Files". If I thought it would take 8 hours every time I'd head for the hills.
However, it's pretty easy to create specialized scans so I'm going to give Sophos a longer tryout and have, for now, removed ClamXav.
ryck