UPDATING FLASH PLAYER [ADOBE] ERROR

I want to install the update flash player which is the product of ADOBE, but I am constantly facing an error message [screen shot is here]

It appears that a browser is still running on your system.
Please close all browsers and click ‘continue’
This is very difficult to me that how to identify the actual problem, anyone to please tell me about the actual problem domain and its remedy for the solution.
I will be very thankful to you.
Thanks in advance.
