UFT 14.50 less performant on Win10 than on Win7

Dear UFT experts,

We are running a Java test suite  on Win7 with UFT 14.50, which takes about 4 hours to complete. On Win10 the same suite runs half an hour longer.

The CPU usage is the same on Win 7 and 10. On both systems the same Java version is used.

The Java application under test is even slower with manual inputs, when UFT is started, but not running a test script.
We observed the same issue with UFT 14.03.

Does anyone of you have an idea what causes this behaviour?

Thanks in advance,
Burkhard