Hi Cassandra,
If I hadn't mentioned this before (and I'm pretty sure I did) I use DEFENDER.
I am STILL plagued by Cumulative Updates not installing. Just for grins I un-paused my updates and it tried for a 7th time to install KB4551762, fail, error 0x800f081f
I immediately re-paused them.
I might not be thinking clearly, but it seems like all this nonsense started right about the same time THE MICROSOFT STORE started popping up at startup daily...
The ONLY third party software I run is Brave Browser, because it is not a memory glut like most other browsers, and come with built in Ad Blocking.
Before you say that IT might be the issue, my browser does not load until I load it, and I have tried several time to do updates without opening the browser.
I visited the site PBurns mentioned only to see his question to the TECHNICIANS being ignored just like our rants here.
I have been using computers since 1984, had the 2nd machine owned by the company I worked for for 32 1/2 yrs.
I have never been as frustrated with an issue such as these CUMULATIVE UPDATES.
I hope I am wrong, but something seems amiss with MicroSoft...
Bob.