Windows 10 First start of eclipse rich client based application after reboot causes 30seconds of Antimalware-Scanning




we have a custom developed application that is based on eclipse rich client plattform (Rich Client Platform - Eclipsepedia) and running on "OpenJDK 64-Bit Server VM (AdoptOpenJDK)(build 25.282-b08, mixed mode)".

When restarting my windows 10 20H2 and starting the app the "Antimalware Service Executable" blocks everything for about 40-60 seconds. When then closing the app and starting it again the app starts instantaneously.

When setting horus.exe (my executable) as an "process exclusion" for Defender, it is always fast.

How can I find out what Defender is doing there? How can I speed this up?

The app itself has a digital signature, but that does not help :-(

The app can be downloaded over there: (freeware for testing purposes).

Any ideas?

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