Sometime when you open asp.net project in Visual studio 2010 and you get the following error message. Even some time when IIS 7.x already installed and running different applications.

Fig a:
Error Message:
https://localhost/ClaimsEnableWebSiteEx01 : error : Unable to open the Web site 'https://localhost/ClaimsEnableWebSiteEx01'. IIS is not installed on this computer. To access local IIS Web sites, you must install the following IIS components:
Internet Information Services
IIS 6 Metabase and IIS 6 Configuration Compatibility
ASP.NET
In addition, you must run Visual Studio in the context of an administrator account.
For more information, press F1.
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Solution:
Open Control Panel-> Programs and Features->Turn Windows features on or off. Under the list of features open Internet Information Services tree and then open Web Management Tools and then select IIS 6 Management Compatibility checkbox. Click OK button and install the selected feature of IIS.

Fig: b
Enjoy guys....