Whenever I try to install 11.6.602 (32-bit) I get an error box titled "Host" with the error message: "Unable to load application configuration" and then an OK button. I tried uninstalling the older version of Flash and now I have no working version of Flash anywhere.
I have Windows XP 64-bit, but use only IE 8.0 32-bit and Firefox 19.0 32-bit.