KB4461614 came out on Jan 8, 2019. It is a security update for MS-Windows Office 32 bits.
Only my computer is MS-Windows 64 bits.
Not only that, I never installed MS-Office, not even the free version.
Why would the OS ask me to install that patch?
Even though you may not have installed Office you may have installed another application that used a part of Office in their product. Windows is seeing that you have something installed that needs an update.
The reason you are being asked to install a 32 bit version of the update is because you have a 32 bit version of Office installed. The default recommended version of Office to install from Microsoft is actually the 32 bit version. Just because you have a 64 bit computer does not mean that every application you run is also 64 bit. That is why you have the "C:\Program Files (x86)" folder on your computer. These are all of your 32 bit applications.
Basically, if Windows is suggesting to install a Microsoft security patch then you should install it. If you experience issues afterwards you can go back and uninstall patches.