Article ID: 816944
When you try to use Internet Information Services Manager (IIS Manager) to start a Web site, the Web site does not start, and you may receive the following error message:
Unexpected error 0x8ffe2740 occurred
This behavior may occur if a port conflict exists on the system. By default, IIS uses port 80 for HTTP communication. If an application other than IIS is running and is using port 80 on the same IP address, you may receive the error message when you try to use IIS Manager to start the Web site.
To resolve this problem, you can do either of the following:
The third-party products that are discussed in this article are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.
You can use third-party tools like TCPView or FPort to identify the other application that is using port 80.
Article ID: 816944 - Last Review: June 20, 2014 - Revision: 2.0
Retired KB Content Disclaimer
This article was written about products for which Microsoft no longer offers support. Therefore, this article is offered "as is" and will no longer be updated.