Try downloading the installer from http://www.adobe.com/products/shockwaveplayer/shwv_distribution3.html
I'm having an issue with Shockwave too. I downloaded Shockwave Player 184.108.40.2067, but can't get it to open or install.
I am running Windows Vista on a Dell Inspiron 1525, and never had an issue installing or updating Shockwave before this update.
Europe, Middle East and Africa