This error can have multiple causes. One of them can be the fact that you want to save in a location for which you don't have enough rights. To fix this, you should start and use the application using Administrator rights. To do this, right click on the program's icon from the desktop and choose Run as Administrator. Also, you should try to change the location of the saved file. To overcome any rights problem, I suggest that you save your file on any other location that C:\ drive. You should be able to overcome the error mentioned.