|Yes, Flash is available for all operating systems.|
Settings are done on the Internet. You can get to the settings by right clicking any Flash Video. This direct link is always available:
The tab you want is the fourth one along.
Seems as if you need to turn off the notification completely then go to Adobe Flash Website and download updates manually when you are on the right account.
You can get them here for the browser(s) you are using - link to the right of the red F:
At yet another website you can check what version your are running (per browser):
If you are going to do it manually it would be best to put all of these links (and maybe others) together in a Folder in Favorites.
If the second link does not fix the issue you are having, then this website always has a current stand-alone file download for IE:
Steer clear of the big blue download button unless you want that registry booster rubbish. If you need a link for Firefox let me know.
We all live on the same ball.