To solve this issue you must run the repair wizard from within an office application, the process of which will depend on the version installed. I will use Word as an example since it is the most popular case.
Enter the Help menu, then select Detect and Repair. Make sure “Discard my customized settings and restore default settings” is checked.
Click the Office button, select Word Options, goto the Resources tab and finally, Diagnose.
Office 2010 products don’t have any repair function available. However, the old repair feature from previous versions of word are still accessible through code, and will solve our problem.
Create a macro. Under the View tab, select View Macros. Enter a macro name, “RunRepair” for example, and click Create. The script editor will open with a stub Sub created for you. Edit the code so it resembles the following:
Sub RunRepair() Application.CommandBars.FindControl(ID:=3774).Execute End Sub
Save your macro and return to the View Macros window. Select your macro and click Run. The repair wizard should appear. Make sure you check “Discard my customized settings and restore default settings” before running the wizard.
if this works you are a legend