Hi, Please furnish your Operating System and whether it is a 32bit or 64bit system. It appears you may have a 64bit system, but it's better to confirm that.
Also if you still have the IE9 beta version you need to follow Microsoft's instructions to update to the released version.
The latest version of Flash Player is 10.3.181.26. The version 10.1 is an older version and you certainly wouldn't want to try to Install a beta version of Flash Player with a beta version of IE9.
Also if you have Installed any other browsers, please supply that info with the versions.