Hello guys. My sister asked me to reinstall her Win 7. So, without hesitation I did a back up of all her important files and reinstall Win. Later she complained me she can`t open some of her Excel files. And asked me to help..ofcourse. I have tried to fix it somehow, for example opened excel in safe mode, used «Open and repair» function - it doesn`t work. I have no idea what it can be and how can I cure it. Does anyone know the solution?