Extract the game's compressed file again, after that, install/reinstall the RTP (link in the 1st post, below the "Downloads" area) and try to save the game. I recommend you skip the intro to check if it works. If not, make sure you didn't extract the game inside a system folder (the ones that require Admin. Access) and just in case check if the folder is marked "Read only" by accessing its Properties window.
Here's a savefile that you can try to see if it loads. Extract it to where the "game.exe" file is located, load it and once you do, try saving in another slot, close the game and open it again to check if you can load the new savefile you created.
As a sidenote, please avoid replying/quoting the first post of the thread and just ask/comment freely, someone will pick up the comment and try to help.