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Each morning when I turn on the computer, the first thing I do is a manual update of the Kaspersky virus signature files. This pops the Kaspersky Update Center which, among other things, shows the number of signatures. This number usually increases, which is logical - new malware is being written all the time.

 

The past few days, the update files have been large, from 600k to over 1 Meg, and the number of signature has decreased from over 6,100,000 signatures to now just under 6,000,000 signatures.

 

Is this normal or do I have a problem? I would expect the number of malware programs and signatures to increase not decrease over time.

 

I am running Kaspersky AV 11.0.2.556 (yes, I know 12 is out. I am waitng for the next big fix, probably in November/December, then I will upgrade) Unless I missed an anoucement, the current signature files should work with 11.0.2.556.

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This is normal. This is Signature Optimization, as has been asked/discussed on this forum 510 204.08 times in the past. Please see: http://support.kaspersky.com/faq/?qid=208279979

 

Combining signatures to have less signatures with the same efficacy is similar to combining topics in the forum, to have less topics, with the same efficacy. :)

 

 

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Hi. I have the same problem with number of signature decreasing for mor than 10 days. Is there any solution for this?

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Hi. I have the problem with updating KIS 2011. The number of signature after update is decreasing for mor than 15 days. Is there any solution for this?

 

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After update number of signature decreased for almost 300000. What happened? Invalid updates or something else? Please help me.

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