Attached Link: (Flash Player) Disable updating via Windows system

You might try this trick for disabling Flash notifications if using the player configuration isn't working. I have no idea if it will help.

I avoid stuff like Acrobat,  Quicktime etc. if there alternatives. Some of them can get really intrusive and hard to get rid of. Flash can be pretty unavoidable though. Do a clean install and then religiously avoid anything you don't absolutely need. Comodo is really good at warning you about modifications and registry updated apps are attempting behind your back. 

"Democracy is a pathetic belief in the collective wisdom of individual ignorance." - H. L. Mencken