Try repairing the Office 2013 installation and check if it helps in resolving the issue.
Repairing an Office program:-
Repair Office 365
Click Start > Control Panel > Programs > Programs and Features.
Click the Office program you want to repair, and then click Change
If you still have the trouble
There could be various reasons for which system is not able to repair.
We need to check the policies and registry settings and exceptions and firewall settings and other kind of settings.
For a quick solution seek an expert's help from the following chat link.
If the issue is still not fixed, it can be a very critical problem with your computer affecting your personal data and the Windows Operating System. You will have to chat with our Experts or you can check with your local technician to get the problems fixed with very high priority.