I have tried the procedure you pointed and it failed. I mean the command line script "FORFILES..." can't find anything matching given pattern. I took a look at %WINDIR%\servicing\Packages dir and didn't see IE-9. There are some Microsoft Internet Explorer files but they don't have "9" in the name.
I have also downloaded IE9 installation file manually from Microsoft download page and when I tried to install it manually it failed with message that newer version is installed on the computer...
The existing version on the computer seems to be broken as I can't start it. Nothing happens - no error window and stuff like that.
In the "turn on/off windows features" window I see Internet Explorer 8 but I can't stop it - it just displayed error windos with message that error happened. No error code, no further hints.