I have a user running Office 2010 that every time they open a given PowerPoint file it prompts them to repair the file: 'PowerPoint found unreadable content in Presentation.pptx. PowerPoint can attempt to repair the presentation. If you trust the source of this presentation, click Repair." If you click repair, it does not appear to make any changes to the file and it opens but it says: "PowerPoint removed unreadable content in Presentation [Repaired]. You should review this presentation to determine whether any content was unexpectedly changed or removed." If you choose 'cancel' as opposed to 'repair' it simply does not open the file. I can't open this same file on other machines running Powerpoint 2010. I have tried running a repair of Office as well as all available office updates to resolve. Any help I can get on this issue would be greatly appreciated.