Today I tested WAU Manager (which I became aware of thanks to this thread by @John782), with a view to adding it to the Make Windows 10 look and work like Windows 7 discussion.
I had WAU Manager look for Windows 10 patches and got a list of 4 available. Then, before doing anything with them, out of curiosity I launched Windows Update Manager (WUMgr) and had that program look for patches to see how the two lists compared.
It came as a surprise to see that the two did not match. Below is a screenshot showing the results that each program gave; the window for WUMgr is inset in the window for WAU Manager:
Not sure what could account for the difference, or how.
Any thoughts/ideas?