"Unexpected Error 0x8ffe2740 Occurred"
This happens because some required ports are not available. The most common application using required ports is Skype. You can conigure Skype to not use these ports:
- Open Skype
- Choose Tools > Options > Advanced > Connections
- Uncheck Use Port 80 and 443 as alternatives for incoming connections.
- Restart Skype
- Start IIS