@RCaron, yes, that is true, Windows Update on Windows 7 has been borked on several occasions in the past few years, the latest one being in November / December 2017.
One solution that works for many people is to type services.msc on the Start menu, click on it, then right-click on the Windows Update service and Stop it. Next, go to the Windows folder and look for the "SoftwareDistribution" folder and rename it (something like "SoftwareDistribution.old" does the trick). Next, go back to the services.msc and Start the Windows Update service. Then go to Windows Update and manually check for updates. New updates should appear. That solved it for many people. It will probably take a while for it to deliver results as it will have to check the system for all the updates present in order to know what is missing.
The only downside besides that is that it will reset the counter on the last time you installed updates and empty the list "View update history". Having said that, all the installed updates prior to that are still installed, they are just not listed on that list. You can still view them by going to the Control Panel -> Uninstall a program and click on the link on the left that reads "View Installed Updates" (where you also get to uninstall them).