I had both Microsoft office 2010 and Microsoft office 2013 running on my computer. I guess when I installed the 2013 version it did not override the 2010 and both programs were still running. I wanted to have programs default to Microsoft 2013 so I uninstalled 2010.
After I did this all of the former 2010 icons for excel did not convert to the Microsoft 2013. Instead I get "This action is only valid for products that are currently installed. error" I am able to open up 2013 excel, but if i try to save it, it saves as a broken shortcut.
When i look in the programs under Microsoft 2013 I do not see excel as on of the programs in that folder, I don't know if that is part of the problem.
This also seems to be the case with powerpoint. Word seems to work fine and converted to the 2013 icons