localhost site is not running in IIS Server ASP.NET C#

 First solution 

1) Right click on the Website folder in windows explorer or in IIS server

2) Go to security tab  > Click on edit > click on add> Click on advance> Click on find now button> Click on IIS_IUSRS> Clik on ok and than again on ok and grant all the permissions

Second solution

if you find below error

HTTP Error 401.3 - Unauthorized

You do not have permission to view this directory or page because of the access control list (ACL) configuration or encryption settings for this resource on the Web server

1) Open to IIS server

2) Double click on Authentication

3) Click on anonymous authentication> Click on edit and select radio button "application pool identity"

Third solution

> Go to control panel

>Click on turn windows feature on or off

> Click on internet information services(Expand it )

>Click on world wide web services

> Install all the feature cgi, asp etc