tag:ask-leo.com,2009://3/tag:ask-leo.com,2009://3.3740- 2009-11-18T17:49:30Z Comments for How can an anti-malware program possibly scan all my files in a reasonable amount of time? Movable Type 4.25 tag:ask-leo.com,2009://3.3740-comment:34895 Comment from Philip Roe on 2009-05-26 Philip Roe A simple principle which explains how so many things can be done very fast is putting things in alphabetcal order. Suppose i have a book written in a foreign languge but which uses our alphabet and I want to know if it contains any English words. (An English word is any of 100,000 or so which is on a list.) I look at each word in the foreign book and for each the question is, is it on the English list. That does not mean comparing iot with 100,000 others. My English list is a dictionary. Finding out whether "reciept" say is in the dictionary (whch we might have to do if we are not sure how to spell "receipt") just menas finding it if it is in or finding the pace where it would be if is isn't. This takes far fewer look ups. 17 in fact. About the log to base 2 of the number of words in the dictionary.

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A comment on: How can an anti-malware program possibly scan all my files in a reasonable amount of time?

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 2009-05-26T17:31:51Z tag:ask-leo.com,2009://3.3740-comment:34894 Comment from umair on 2009-05-22 umair could fast scans be a bad thing? NOD32 does a full scan 5 times faster than Avast.

But..

i scanned Omea Pro.exe (an insanely powerful free RSS reader) with NOD32 v4. the log shows it tried to scan various .dll, .txt, .exe objects but against each it said something like "OmeaSetup-2.2.1.exe » NSIS » StartMenu.dll - decompression could not complete (possible reasons: insufficient free memory or disk space, or a problem with temp folders)"

i have gigs of free space and 1gb of my RAM was free when i ran the scan. so could it be part of the complex algorithm? how do i ensure that a particular file is actually scanned? there seems to be no way i could make NOD32 scan that file.

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A comment on: How can an anti-malware program possibly scan all my files in a reasonable amount of time?

Tech Questions? Get Answers! - Ask Leo! ... by Leo Notenboom
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 2009-05-23T06:28:19Z