We have seen a few instances where an Office 2010 Add-in stops working and cannot be enabled even is deleted and reinstalled.
This can effect our DotNetNuke Module – Microsoft Word Editor, as it uses the Microsoft Office Add-in feature of office.
The cause of the problem lays in Microsoft (again) that have decided to make Word (and other office Add-ins) mark a plugin as “Disabled” if it is ever involved in a slow response or crash.
Good concept to stop plugins crashing word, but how they do it is so unobvious it catches many people out. The plugins are added to a “Disabled” basket, and will never again be activated unless moved from that basket. Even if the add-in is uninstalled and re-installed.
To fix the problem you need to remove the add-in from this list of disabled items in your office application.
It does not escape comment that Microsoft Word remains the only application I know of that has a crash recovery system built into it. Rather than fix the problems that cause it to crash, they built a system to recover after crashes.
Since Word 2000, you can take an INDEX and regenerate it, then fast scroll on the newly created index to crash the entire application. 10 Years of development, and all I can see is tweaks around the edges. No wonder the company is on a massive down hill slide! “Microsoft – Taking the fun out of computing”.