Hello everyone! I have found a simple fix for solving the problem that I always get, and decided to share it all with you.
THE PROBLEM:
FiveM freezes after I alt+tab, and it takes up my whole screen. Usually I have my task manager behind my FiveM Screen, so I am unable to get task manager. Also when I do Ctrl+Shift+Esc, it opens on my middle monitor (FiveM Screen).
THE FIX:
Download SuperF4 from here.
Install it, so when you get the problem again, do Ctrl+Alt+F4.
I hope this helped anyone that had this problem!
CREDITS:
Credit goes to Stefan Sundin for SuperF4.