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Andrey Korochkin

[FAQ] Testing of wlengine.dll update

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Supported products:


• KFP 2.0 (

• KAV/KIS 2014 (

• KAV/KIS/Pure 2015+


OS coverage:

The products should be tested with supported OSes.


What to pay attention for:

Crashes of product and third-party software



0. Update from test update source, restart product. Check that new version of wlengine.dll is used.

1 Enable Trusted application mode. Check:

1.1. List of unknown applications does not contain applications with a valid digital signature.

1.2. No Trusted by KSN in untrusted list

1.3. Section manage blockings is shown in Application control. Information that Trusted application mode is enabled is shown with lock

1.4. Changes in 1.3 do not disappear after KIS reloading

1.5. Changes in 1.3. do not disappear after system reboot


2. During Trusted Applications mode is enabled:

2.1. Application with no valid signature but Trusted by KSN is not blocked

2.2. Unknown applications with no signature are blocked


3. Unblocking of unknown applications works:

3.1. From buttons in balloon (there is a bug that 2 balloons appear in some cases)

3.2. From manage blockings section


In case of problems:

Please check if the issue is reproduced after update from public source and restarting product.

In any case collect traces, and (or) screenshots for specific issues

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