You may see an Error icon appear in the IIS 5.1 Management Console, and a message stating “Unexpected error 0x8ffe2740 occurred“. This can occur on Windows XP if WinRM (Windows Remote Management) is running. WinRM is Microsoft’s implementation of the DMTF’s WS-Management standard, and runs on port 80. This can cause a port conflict, and prevent the IIS service from starting.
To resolve this issue, stop the Windows Remote Management service on the system, and then start the IIS service.