Hi everyone,
it cost me 2 full days to find the root of the problem, but now I found it:
The newest version of Malwarebytes (4.3.0.98) causes the computer game Age of Empires 2 Definitive Edition to lag. The lags are constantly occuring and delay the game execution by 0.5~2 sec. In multiplayer this is compensated with a fastforward, making it really hard to live with that situation. It took a while to trouble shoot this, but finally I found the culprit: deactivated Malwarebytes I don't have lags anymore.
I have a second computer laptop where 4.2.1.89 is installed and it doesn't cause lags. The lags came with a more recent version (newer than 4.2.1.89) but I can't tell exactly which one. But the last time I reinstalled Malwarebytes it asked if I wanted to install additional real-time protection or something like this (what was it exactly?). Maybe this was the update that caused the problems.
I am happy to include logs if I am instructed how to do so. Otherwise I will turn off malwarebytes when I am playing but if I forget to re-activate it after playing too often, I might consider moving to another virus protection software. That would be sad because so far I am really happy with Malwarebytes.
Best regards
Kon