Unsure of Flash Player update version 11.9.900.152

This morning an Adobe box popped on my screen.  It showed I needed to update Adobe Flash Player version 11.9.900.152.   I clicked on START.

The next page came up and a box from Norton Security popped up saying it did not recognize this!

On the second page that popped up it has a box at the bottom which reads:

The install_flashplayer11x32axau_chrd_awa_aih.exe download has completed.  Then it says,

RUN, SAVE, or INSTALL.  I clicked on SAVE.

Is this a verified site of Adobe???