We used to have lots of information in Bits & Bytes about subjects like this. Not being an IT person, I depended on it a lot. On October 4th, our HP printer stopped printing. After struggling with it all day, my husband took it to a shop in town. They were very busy and couldn't schedule us earlier than Tuesday. So okay, we waited until they called us yesterday to tell us the printer worked fine there, but they suspected that we had update KB4524147 (build 18362.388) on our computers and recommended deleting it. This upgrade was actually supposed to fix an earlier update KB4522016 (build 18362.357) that was supposed to fix a few issues with Windows 10 version 1903 (May 2019 update), but shortly after the release, a small number of users started reporting problems with the print spooler service that prevents a print job from completing successfully. That one didn't affect our printer, but the aforementioned KB4524147 made up for it. I went to delete it this morning, but Microsoft had beaten me to it by downloading Update KB4517389 that finally fixed the problem. The shop only charged us $32.50, which we appreciated as our warranty has expired. I know most of the regulars here probably know all about this, but it might help a few people out there. I saw a comment by an IT person that all their department HP printers had stopped printing last week. I don't know if it affected any other brands.