'Virus Total' only scans uploaded files but it does not 'fix' anything, correct?
correct ... VT is not on your computer it is online
[b]Should only recognized files be 'accepted/unblocked' [/b]or should all detected files be scanned using 'Virus Total?'
Not sure what you mean ..... testing files at VT is a user choise, you do with your file(s) as you want
Will Avast only detect files attempting to be downloaded or anything that might be suspicious on a webpage?
it detect malicious downloads and infected websites

Now try using google a bit :wink: