Everytime I try and save the game (I'm into it a little, now) the game crashes to the desktop. I have three other saves 0- no problem. I can't get this 4th one to work. Am using nVidia GeForce 9600GT, Win7, Intel Pentium Core Duo processor 3 GHz.

I went back and was able to progress in the game. I even was able to save it AS LONG AS I didn't use my keyboard to change the name of the save. I had to overwrite a previously saved game to do it. How can I fix this problem?

Try setting the executable to "Run As Administrator."
If you have a desktop shortcut that points directly to the game's executable and not to some "launcher," you can set it to always "Run As Administrator" on the compatibility tab.