Printers
It's true, my Win10 workstation lost the ability to print *twice* after recent updates. For me the solution was a full rebuild of the printer installations - remove the printers, the ports and the drivers, then a full reinstall. The problem was that some print drivers do not want to uninstall, with an "In use" error, which turned out to be (after a dig-dug through the registry) that some print drivers install x86 and x64 versions of themselves. Removing the printer removed one version of the driver but not the other (usually leaving the x64), thereby causing the deletion hang.
Yes, I know, my decades-long history of hacking the Registry allowed me to fix it and I'll agree, that isn't a solution for all but the hardest-core, and shouldn't be needed in the first place. But, after much detective work, it works.
The problem seems to be old drivers; once everything was updated and synchronized (the various thermal label printers are direct USB-connected) it all works now. But a lot of people will / would / are tearing their hair out over this.