Dont know what to do!

I always play games on the web site called I won. Ive never had any problems so far but they have on on line chat to use if you want to. I always used it. Now it keeps saying that I need to download the latetest version of Adobe & Flash player. I have the latetest version of Adobe but when I try to upgrade my flashplayer my computer wont let me! Im clueless as to what to do. Does anyone have any advice?