David, I'm curious about your scan times. My full scan takes over an hour. The fast scan takes 30 minutes. About the same for both the now deleted Ewido 4.0, and the newly installed AVG 7.5. I normally run it without pausing the standard shield, but the times are virtually the same if I do. What's your secret?
Edit:
Using 11 gigs on a 60 gig hard drive. Like you, I don't sit in front of the computer waiting for it to finish, so it's no big deal. Just curious.
No secret but, you don't mention anything about your system spec., mine are nothing hot. I notice you have other security based software (Windows Defender) which is resident and I assume that you don't disable it either these could combine to effectively slow the scan duration. I never have any other resident security program running when I do a scan, this avoids potential conflict and duplication of scanning.
On an avast standard scan it scans about 6GB of data so I can only assume it is similar. With the ewido/avgas Fast scan as it doesn't mention GB of data scanned only the number of files/objects scanned so I don't have a direct comparison.
In total across two HDDs I have 23.91GB of data, my second drive is primarily for 'drive image' back-ups and daily data file back-ups. I have the drive image files excluded in avast anyway but not in ewido/avgas.