I use this to check the current version & what I've got installed:
http://www.adobe.com/software/flash/about/
I normally just use their normal download off the Flash Player home page, but last time it gave me a few problems on one PC so here's the links for the full installers -- the one with AX in the filename is for Internet Explorer.
http://fpdownload.adobe.com/get/flashplayer/pdc/11.6.602.171/install_flash_player.exe
http://fpdownload.adobe.com/get/flashplayer/pdc/11.6.602.171/install_flash_player_ax.exe