System throws "Unexpected Error 0x8ffe2740 occured.", when i trying to start IIS. This kind of error will occur when there is a port conflict.
IIS is configured with the port number 80.
The following command will help to find the port usage,
netstat -anop TCP|find ":80 "
In the result file look if port 80 is LISTENING. If so, another program is using port 80.
1.Close the Application, which is using the port no #### (port number 80 in my case)
In my case 'SKYPE' was causing the problem; In the Skype options i found: 'Connection: use port 80 as an alternative.'
After closed the skype, I Started IIS, It works.