So I spent hours diagnosing this as I thought it was my computer's hardware. I finally came to the conclusion that whenever using the multimonitor taskbars with displayfusion, if you play a video in fullscreen on chrome in your secondary monitor, it will hard freeze your computer and reboot it! Sounds like hardware issue doesn't it? Well it isn't. This is a massive problem since I cannot use DF and multitaskbars now. This is on a fresh install of windows with all new parts (I needed an upgrade anyway so I bought several new compenents.) I also tested this on various other PCs I have and the same issue is there. Please let me know when you have a fix for this so I can use this program again. Thanks

Also, this only happens in the RIGHT monitor but not the left one... weird huh? I tried changing the cables and trying different ports and even a different video card and RAM just in case those were the problem.

My setup:
i-9900kf
Asus Strix-E z390 MB
GTX 2080 SUPER
3 Monitors all 144hz and 1440p