It seems that something is broken with the last update of Windows Defender.
COM objects initialization takes long time now.
Previously, MediaMonkey app with "RegExp Find & Replace" addon started just in 3 seconds.
Now, it starts 60 seconds !
If I disable real time protection then it starts in 3 seconds again (original report).
We found that it is caused by COM objects initializations/calls (OLE automation), when the addon is adding an item then new COM object is created and the Defender's real time protection seems to check the COM object creations somehow (via oleaut32.dll)
There is a delay between oleaut32.DispCallFunc callbacks e.g. it is without a delay 10 times and between 11th and 12th call of DispCallFunc there is 0.2 seconds delay.
Can this be looked into by Microsoft? Where could I report the issue to developers?
Moved from: Virus and Malware / Windows Defender / Updating Virus and Spyware Definitions / Windows 10.