I hate to say this but I am having this issue as well. I was using TeamViewer to control my gaming computers (I have one specifically set up as an Android Emulator) until I realized that for some reason my computers speed was cut to 1/4th when Teamviewer was running. I mean literally I was getting 60+ fps in BlueStacks 4 without TeamViewer running but when it was running? Barely 15fps. I am honestly getting suspicious of TeamViewer because of this behavior and wondering if it is using my machine for some undisclosed purpose. The last time I had performance issues this bad was with an application that later was found to have been compromised with mining software.
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