I agree you need help on this. There's no reason for it not to work other than some technical difficulties. Being stubborn helps as it means you won't give up too easily!
Let's check a few system things outside of the ACL, aka Access Control List, because this these can cause symptoms similar to what you're seeing. Being a retired computer technician, I have found it's usually the stupidest and easiest things that cause the most problems and we need to look for the things we've been ignoring. As a tech, I've done it myself while troubleshooting a problem. I've spent hours going in circles while the blast thing was right under my nose!
So...
On the drive where you are installing TRS2019, how much space do you have?
Have you had any hardware issues, not counting video drivers, that might have caused a system freeze?
Have you tried putting your data and program outside of the normal places?
Data goes into that gawd awful C:\users\%username%\App Data\Local\N3V Games\TRS19\Build x3438xsdf09sdf\ etc., which makes doing a lot of things quite difficult.
When prompting to install, edit the line that says C:\Program Files\N3V Games\TRS2019 and try C:\TRS2019.
When it comes to the data path, (Install path), try C:\My TRS19_Data instead. If you have another hard drive all that's all the better.
But before you do this, let us know how much space you have, and other system details. It could be a bunch of things. We can also help you run utilities by giving you suggestions if you need to use them to clean up the system and check things out.