Microsoft announced in 2017 that it would no longer support Office 2013. All critical updates for 2013 products ended April 10, 2018.
Please upgrade to the newer versions of Office. Bristol Computer Support recommend going for Office 365 Standard, where you will consistantly be upgraded to the versions as they are released.
Office 2013 client applications and language packs are no longer available from the Office 365 self-service portal and Admin Centre.
Microsoft no longer release feature updates for Office 2013.
You need to upgrade to Office 365 or 2019 right now.
Microsoft Office 2016 still gets upgrades however doesn’t work with Microsoft Exchange Servers 2007 or earlier.
The support for Office 2016 ends in October 2020.