Most of us use adobe reader for reading pdf documents, the most annoying problem with adobe reader is the pop window which pops up every time you open adobe reader.
You may have pressed the cancel button so many times, but it again pops up when ever you load or start adobe reader( as shown in the image below)
The pop up window can be stopped by showing up, by disabling updates in adobe reader. (as shown in the image below)
Uncheck the option highlighted in the image above which says: Display notification dialog at startup and click OK.
That’s it Done.