Software SolutionsOn Screen Keyboard “Not Installed”?

I have the same problem I had the keyboard and now it says it is not installed. I have Windows 8.1, Java 7 and the latest version of AI installed. I also have a second windows machine and that works! Strange! I have checked the settings and the path is to the AI keyboard.
Pleasse advise how I can reinstall or do I have to uninstall and reinstall?