If you have Office 2016 installed and activated, then install an Office 2019 app, such as Visio, you may run into problems:

• When you activate the Office 2019 app, it may break the activation of Office 2016
• If you re-activate Office 2016, it may break the activation of the Office 2019 app
• When you try to run an Office 2016 app, it actually runs the 2019 version

Download the fix-it tool from this web page:

https://support.office.com/en-us/article/Uninstall-Office-from-a-PC-9dd49b83-264a-477a-8fcc-2fdf5dbf61d8

Basically, it uninstalls all MS Office apps and digs it out of the filesystem (and registry?).

Then go to https://account.microsoft.com/services if you need to download any software or find license keys.

1. Run the Fix-It tool
   1. Reboot?
2. Download, Install and Activate Office 2016 Home and Business first
3. After that, download, install and activate Visio 2019

These scripts from MS will get you the last 5 digits which may help you back track.

At a command prompt, type the following for the appropriate version:

• Office 2010 (32-bit) on a 32-bit version of Windows

cscript "C:\Program Files\Microsoft Office\Office14\OSPP.VBS" /dstatus

• Office 2010 (32-bit) on a 64-bit version of Windows

cscript "C:\Program Files (x86)\Microsoft Office\Office14\OSPP.VBS" /dstatus

• Office 2010 (64-bit) on a 64-bit version of Windows

cscript "C:\Program Files\Microsoft Office\Office14\OSPP.VBS" /dstatus

• Office 2013 (32-bit) on a 32-bit version of Windows

cscript "C:\Program Files\Microsoft Office\Office15\OSPP.VBS" /dstatus

• Office 2013 (32-bit) on a 64-bit version of Windows

cscript "C:\Program Files (x86)\Microsoft Office\Office15\OSPP.VBS" /dstatus

• Office 2013 (64-bit) on a 64-bit version of Windows

cscript "C:\Program Files\Microsoft Office\Office15\OSPP.VBS" /dstatus