Slitherine

After I upgraded my PC with Windows 10, BA2 starts up and runs correctly, but I can no longer either save a game in progress or delete any old files.

Any ideas how I can fix this?

Paco

Try uninstalling and reinstalling the game.
Before running the game rename the folder BA2 in the Windows documents folder:
....\Documents\My Games

Please also make sure that you are login to Windows as an administrator.