My questions pertains to scans of archives that I've downloaded. I don't understand how a scan can take 5 seconds sometimes. If the total size of the archives is 500 - 1000 MB, how can it take so little time in comparison to Avast for example? I like SAS. I especially like that it isn't a resource hog and performs a complete scan in an hour or less. How can it be thorough in so little time?