Storebror, et all,
Reason I've been gone is that my hard drive died. The backup I thought I had was not there so I lost a great deal of stuff. I was fortunate to dig through an expansion drive and a laptop which had most of my coding work, and some other personal stuff like pictures and videos. It's been a pain because I lost a lot of things, and I did everything to recover it including replacing PCB board in drive, and BIOS replacement.
The good news is that the problem is gone and solved. My wife felt so bad for me she actually said it was cool for me to get another PC. I got an Alienware that is a really good gaming PC with Optane, plenty of RAM, and a nice NVIDIA card, at least from my perspective (GeForce GTX 1080).
I was able to play BAT without any issues in the mission I mentioned in the original post. Pretty smooth. So I guess the lesson is that PCs from many years ago do not perform as well as the newer ones... duh... Anyway, I have a network backup drive I set up for all the PCs at home and it is working. Now back to re-installing a lot of stuff and re-organizing my files from 2 sources.