We have recently moved from windows 7 to 10 (very late I know) and have found that when displaying two clients and focusing on one the other client fps drops dramatically e.g. the focused window was at 50-60 fps and the non-focused window was at 5-10 fps.
The current setup is using a dedicated server and then connecting two clients on a computer with two monitors that each need to display a client.
This was not a problem in Windows 7 (which balanced the fps for both clients), and only happened on Windows 10. This may be a windows question but I wanted to check if anyone had the same problem and had a solution.
I had also seen the GPU hardware acceleration scheduling, but we are using a windows version before version 2004 so there is no options for this.