Beepster, do the following.
Windows+X ->Apps and Features -> Adobe Flash -> Uninstall
It'll probably prompt you to close your browser during the uninstall.
And that's all there is to it! Now go about your usual browsing habits and observe that nothing is different!
I was irritated by those Flash updates for years until about 2 weeks ago when I thought, why in the hell do I even have this junk on my computer? So I removed it. And I haven't noticed its absence once since then. Most things are using HTML5 video these days, and if they're not, then they're probably not even worth dealing with.