Hello. Thank you for the reply, Snick.
Last night, I ran MBSA without "Advanced Update Services Options" selected and again with "Scan using offline catalog only" selected. It said I was missing two updates, the time zone thing for Namibia, which I forgot about, and KB4096040 Cumulative Security Update for IE 11. I installed both of those.
It seems kind of weird to me that in Windows Update History it says February rollup updates were installed on March 13, but maybe that's okay. What do I know? I am attaching a screenshot of my Windows Update History for that desktop PC (Windows 7 Home Premium 32-bit).
When I got done with that stuff last night, I downloaded Bitdefender free version and clicked the file that downloaded, which started Bitdefender downloading. After Bitdefender downloaded, before installing, it said something about incompatible software installed, Malwarebytes, and please remove installed antivirus software before installing Bitdefender. I didn't install Bitdefender. Do you have any problems with both Bitdefender and Malwarebytes installed together? Malwarebytes Premium is now installed on both of my desktop PCs. That's all the security software installed ATM.