It is always advised to install the latest versions of Reader and Flash Player on your new computers. Below are the links to install the current versions:
Adobe Reader 11.0: http://get.adobe.com/reader/?promoid=BUIGO
Flash Player 11.5.502.135: http://get.adobe.com/flashplayer/?promoid=BUIGP
Internet Explorer 10 on Windows 8 comes with Flash Player preinstalled; you don't need to (and cannot) install Flash Player manually.
Use Windows Update to get the latest Flash Player for IE10.