Hey there base on this test report by an individual, it seems that your detection rate has not improved and there are a few locations/files that you miss.. Avast seems to be improving their detection rate. Could you update your database/scan engine to improve the detection rate at those missing location/files
April's detection rate
http://securityspread.com/S0urce/Arch1ve/LatestDetectionRates-Apr2014.pdf
Source:http://securityspread.com/
Other vendors also seem to use this results and it seems that F-secure improve its detection rate once after those results are release
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