I have Microsoft Office Professional Plus installed on my Windows Vista. It was working fine and I was super satisfied with till it started giving me unseen troubles. Whenever I try opening Microsoft Word, it gives me a weird kind of error: 'This file does not have a program associated with it for performing this action. Create an association in the Set Associations control panel.' At times, I also get ‘This application has failed to start because the side by side configuration is incorrect.’ as an error.