You have three real choices:
Microsoft Office 2013 requires activation to ensure that users have a genuine copy of the software. There are a few activation methods: ms office 2013 activator key
If the product key is valid, MS Office 2013 is activated, and you can access all its features. If the product key is invalid or has already been used, you will not be able to activate the software. You have three real choices: Microsoft Office 2013
A popular alternative to dangerous activators is buying a "cheap" Office 2013 product key from an online marketplace for $5 to $15. MS Office 2013 is activated