What they are trying to tell you is Windows likes to control things without telling you what it’s doing. Microsoft loves to obfuscate things for no reason. I understand why they did it, but they don’t tell their consumers anything.
C:\program files\ and C:\program files (x86)\ limits writing to the directory to administrator accounts.
Two ways to fix it. One run the game under administrator account.
Or simpler, put the game someplace else that is not write protected.
Once I found out they did this. I created my own directory for applications, and my games are on a completely different hard drive.