I am getting "snap-in failed to initialize" when starting IIS Manager, how can I start IIS Manager?

The complete error message is:

Snap-in failed to initialize.
Name:
CLSID:{A841B6C2-7577-11D0-BB1F-00A0C922E79C}

To solve this problem, re-register the inetmgr.dll file.

* Click Start->Run, type cmd and press ENTER
* Type regsvr32 %systemroot%\system32\inetsrv\inetmgr.dll and press ENTER