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McAfee kills asp-classic after move form Windows Server 2012 to 2019

I had/have some Windows 2012 Servers with different applications that were to move to Windows server 2019. One Java-server, two IIS asp-classic, all three having data in Access-databases

The Java application moved with no issues

The IIS had 200% runtimes with McAfee consuming the larger part of CPU. After 2 minutes of runtime, the worker process (w3wp) would get some 2% of CPU-time, while using a full CPU when left alone.

When disabling Adaptive Threat Protection runtime was more like 150% of the time on the old server - or the new one without McAfee

McAfee versions are the same on the 2012 and 2019 servers (10.7.0)

The problem resembles https://forums.iis.net/post/1916675.aspx, but it is old and not solved.

I was advised to move data to SQL-Server, to take Access out of the equation. (Remember the Java application had no problems with Access and McAfee)
It helped a little - McAfee was slightly less agressive, and benchmarktime went from 6 minutes to 5:30, still worse than the 2½-3 minutes on the old server.

Why is McAfee so much more agressive on Windows Server 2019? And what can I do about it

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