If you are using the 32-bit version of IE under a 64-bit Windows OS, Flash will work properly. However, It is not supported under the 64-bit browser since Adobe STILL has not developed a 64-bit version of Flash Player. If you are using the default configuration, you are using the 32-bit version of the browser. To use the 64-bit version, you must explicitly start it from Start -> All Programs -> Internet Explorer (64-bit).