How to Fix Error Code 0x43 in Office 365
Error Code 0x43 of Microsoft Office commonly occurs because of an existing installation of MS Office pack in your computer system. Please note that this error is relevant to all the editions of Microsoft Office 2016, office 2019 and Microsoft Office 365.
This can occur in the below enlisted versions of the MS Operating System
Windows Server Edition of the year 2012/2008
Windows 7 /8 /8.1/10