@jkr63 Okay, before i suggest this next thing, and yes i know this sounds very repetative but i want to make sure this is entierly everything.
1: Disable Startup Programs, to many running can cause problems.
2: Disable Apex Legends Full-screen Optimizations
3: Run Apex Legends as Administrator this can be done in application settings
4: Check Apex Legends System Requirements and make sure your pc meets all of them
5: Use No Alt + Tab Key
6: Repair Apex Legends Game Files
7: Update the Graphics Driver
8: Uninstall and Update Microsoft Visual C++ Redistributable Packages
9: Disable Windows 10 Game DVR
10: Disable Easy Anti-cheat Service
11: Increase the Visual Memory
12: Change Apex Legends Frame Rate (which would be capped in Launch options)
13: Download Apex Legends Update Patch (if one is available)
14: Uninstall and Reinstall Apex Legends
If none of this works. the Best advice i can honestly give you and its a VERY LAST RESORT. is to reinstall windows completely. (Requires USB 8GB) Re install all chipset drivers and graphic drivers, Update bios (requires USB 8GB). This solution usually works but its a lot of recovery work if you have important documents.