Have a six-month old Lenovo Yoga13 ideapad with Win8.1 and Office2013 installed. Excel "stopped working" suddenly (no other changes). Re-installed Office2013 completely. Excel still not working.
Went to SAFE mode and none of the Office suite will start.
Nothing helpful on the Microsoft site at this point.
Avast virus protection and very careful.
Could this be from Win8.1 installation?