Adobe Flash player installation problem on Windows 7

DEar Commerades

will appriciate your help with this problem.

Have  problem with installing the AFP, it will say:

" The User does not have sufficient privileges to install AFP "

this after turning off Explorer.

my browser is Firefox, though did not even got to the point of activating Addons since it does not install itself properly.

thank you for caring

and will be happy with your  knowledgable answers.