I assume this happened because I looked at a PDF file.. I browsed away from it, and this message pops up saying "Reboot Required" "You must restart your system before you can do another update." and the only choice I get is an OK button. Too cowardly to even identify what program spawned it, but I know it's you, adobe. Who the hell do you think you are, telling me to reboot? Rebooting is for changes to the OS. Not changes to a piece of software that displays PDF files. Go screw yourself, adobe, I'm not rebooting.
Ended the acrobat reader process from task manager, and the so-called dialogue box disappeared. (That's not a dialogue, that's a threat. I don't respond to threats.)
And I'm not rebooting.