slow performance

I might be causing my own problem here by insisting on running Windows Server 2016 as my OS for Blue Iris, but alas that is what I have set up. I have been dealing with poor BI performance on my old hardware which was a very old i7-3770K (Ivy Bridge), and I assumed that was the problem. So...

I'm a dealer and the last 3 we've put in all show ridiculous cursor lag when using the mouse on the console. All are fully populated with 16 3mpxl HIK DS2-2032i cameras and just took the default NVR settings options (more or less plug and play). The cursor will freeze for a good 3-5 seconds...