Hello
Anyone knows how I can force my web browser to automatically update its flash version to the latest one? Or any code which I can add in HTML to verify and update flash if a flash content is encountered?

It depends upon the browser. If you are using Firefox with the flash plugin for that, then it will automatically update when you start the browser if necessary. I don't know about IE since I don't use that except to do Windows updates.

Chrome should have that features as well. Go and check your plugin.

Should the flash plugin be present in the IE addons explorer? In mine I can see for adobe reader and java, but none for flash

Then download it