On this page you can test out if Flash is installed or not. Could you let us know what does the page say when you visit.
Also provide details about the browser you're using, and have you tried using another browser.
You need to download and the INSTALL Flash Player. Did you go through the site Vikrant provided you?
See the following links:
Also, please let us know your operating system and browser. Visit this page for help.
The table in the site gives you those details