A technician performs an in-place upgrade from Windows 7 to 8.1. After the upgrade is complete, a user reports that a frequently used file will not open. Instead, the user is prompted to search the Windows Store for an appropriate program to open the file. Which of the following should the technician do FIRST?
A. Install the most recent Windows updates
B. Verify the USMT worked properly
C. Reconfigure the default program for the file type
D. Perform System Restore
E. Reinstall the program that is usually used to open the file