Windows update is supposed to update the Flash Player for IE10. Personally, I don't use IE because it's 100% garbage disguised as a browser.
You can download an offline installer here: http://helpx.adobe.com/flash-player/kb/installation-problems-flash-player-windows.html#mai n-pars_header
Me? I'd download Firefox and the Flash Player for it, and give up IE. You'll save yourself a lot of headaches by using a more sensible browsing application.