Hi ringo su kom,
There's thing that will work, If you change the update settings to 'Allow Adobe to Install Updates(recommended)' which will be set for all the three player types --> Background updates. Majority of the Updates will be installed using our silent background only; hence no pop-up.
But, Once in a couple of weeks when we have a major security fix or a major version release we put up a notification just to intimate that flash player users that this change is important or has some important fixes, plus this also supports flash player financially (Flash Player installation and update questions and answers).
Please let me know incase more information is required
I have already created one some time ago, and works great!
It uninstalls, does a cleanup depending on the OS, grabs the latest flash downloads for all three( ActiveX in win8.x and higher will not be downloaded or installed ), and installs them silently, I also added shockwave into the mix.
I suspect that Adobe refuses to do something so eloquently simple is because they are trying to force-feed users their sponsors 3rd party bloatware programs and/or use some elaborate method to try and guess the end users needs, but apparently from looking at these forums is nothing more than a mess.
I have all that posted at Source Forge and a simple query on Google should yield the results: