IIS Manager does NOT start and you receive a message similar to:
Snap-in failed to initialize.
This behavior is symptomatic of the Inetmgr.dll library not being registered.
To resolve this problem:
1. Open a CMD.EXE Window.
2. Type regsvr32 C:\Windows\system32\inetsrv\inetmgr.dll and press Enter.
3. Press OK to acknowledge success.
4. Close the CMD.EXE window.