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Webapplication fails to load content when authenticated using windows authentication

I'm developing a ASP.NET MVC webapplication currently running on IIS Express (for development).
The webapplication has two pages
Computer
Department
General authentication settings in web.config
<system.web>
<authentication mode="Windows" />
<authorization>
<allow users="*" />
</authorization>
</roleManager>
</system.web>
The DeparmentController enforces authentication using the authorize attribute:
[Authorize(Roles = #"DOMAIN\Administrators")]
When visiting the computer page unauthorized, all content loads fine.
When visiting the department page, I'm prompted to enter my credentials. The authentication works as expected, but I get '500 Internal Server Error' on css, js and ico files.
During my research, I only found the exact same problem the other way around. Where the static files where not loaded for unauthorized users.

Did you implement windows authorization within iis as well, also does your user have permission to the directories that the page is displaying?

windows authentication in asp.net

In Asp.net Application for windows authentication
In aspx page
asp:Label runat="server" ID="windows"
aspx.cs page
windows.Text = User.Identity.Name;
webconfig:
authentication mode="Windows"
but authentication is not performed what problem ??

Add the following in your web.config under system.web to make sure that the windows authorization is triggered:
<authorization>
<allow users="?" />
</authorization>

Your web.config wants to contain like this:
<configuration>
<system.web>
<authentication mode="Windows" />
<anonymousIdentification enabled="false" />
<authorization>
<deny users="?" />
</authorization>
</system.web>
</configuration>
This will force all users to use their windows/Active Directory login. A 401 Access Denied error will be given to those who don't log in.

Because Integrated Windows Authentication uses the current Windows
user information on the client computer for the authentication, it
does not immediately prompt the user for a user name and password.
However, if the authentication exchange cannot identify the user, a
dialog box appears that prompts the user for a Windows user account
user name and password
Source: How to implement Windows authentication and authorization in ASP.NET
Try adding the following block to see if it's working
<authorization>
<deny users="*" />
</authorization>
After adding this, run the application and you should get HTTP 401 - Access is denied error.
You can customize authorization from then on.
UPDATE:
Here's a different approach and how to configure it via IIS management console:
Deploy your site to IIS
Click on your site and select Authentication
Disable Anonymous Authentication and enable Windows Authentication as shown in the image below
Go back to features and select .NET Authorization Rules. Here you can add allow/deny rules on a role or user basis.
To test your current code deny anonymous users and allow all. When you connect to your application you should be able to use the Windows user you used to log in.

Can't login to website using windows authentication IIS

I've been searching for a solution for this headache for a quite long.
I have a website that I want to deploy to my web server, so I'm using IIS 7 and followed these steps to authenticate logging into it:
1- Open IIS
2- Add Website (with random port number)
3- Set the application pool for it to a specific Identity
4- Disable Anonymous authentication then enable Windows Authentication.
5- Remove "Allow All users" rule
6- Add allow rule for an admin user and give him full control access
When I try to access it it asks for a username and password which must be the same user as the one added in step 6 .
The problem is whenever I click ok the logging window keeps popping up and can't access the website as a result
I also tried to add deny rule for anonymous users
Is there anything must be added to web.config file or something ? Do I need to install something or disable something ?
Any suggestion is very appreciated
EDIT
This is my web.config file authorization section
<system.web>
<authentication mode="Windows" />
<compilation targetFramework="4.5" />
<httpRuntime targetFramework="4.5" />
<pages validateRequest="false"></pages>
<identity impersonate="false" />
<authorization>
<allow users="SomeUser" />
<deny users="*"/>
</authorization>
</system.web>

After spending hours trying to solve this finally I figured out the solution
1- Open IIS
2- Add Website (with random port number)
3- Set the application pool for it to a specific Identity
4- Disable Anonymous authentication then enable Windows Authentication.
5- Remove "Allow All users" rule
6- Add allow rule for an admin user and give him full control access
Note: all previous steps were made using IIS wizard
7- After openinig web.config file I can't find any changes after adding allow rules so, I had to do it manually by adding <authorization> tag then adding these rules in the same order (this order is very important either it won't work)
<authorization>
<allow users="<the user that you want to give an access>" />
<deny users="*" /> <!--to deny all other users-->
</authorization>

From MSDN, you need to enable windows authentication both in IIS and ASP.NET application:
Start Internet Information Services (IIS).
Right-click your application's virtual directory, and then click Properties.
Click the Directory Security tab. Under Anonymous access and authentication
control, click Edit.
Make sure the Anonymous access check box is not selected and that Integrated Windows authentication is the only selected check box.
In your application's Web.config file or in the
machine-level Web.config file, ensure that the authentication mode is
set to Windows as shown here.
...
<system.web>
...
<authentication mode="Windows"/>
...
</system.web>
Enabling windows authentication on IIS so that IIS authenticates the user.
Adding a setting to your web.config so that ASP.NET knows what authentication provider to use. In this case, ASP.NET uses windows authentication provider to set the value of the current User property to a WindowsIdentity based on the credentials supplied by IIS.
Also check for authorization:
The rules are checked from top to bottom and stopped at first matching rule. Therefore, you should specify allow before deny. Example:
<authorization>
<allow users="John"/>
<deny users="*"/>
</authorization>

ASP.NET Forms Authentication - not redirecting to any page

I'm in the process of learning ASP.NET and am still fairly new to the programming world.
While learning about authentication/authorization, I edited my sample app's web config file to enable forms authentication, and authorization to deny all non-logged in users. I created a blank Login.aspx form as well, but when I try to execute the app, no pages appear. IE shows:
"Page can't be displayed"
even though I'm told it should redirect to my Login.aspx file automatically. Other browsers such as Opera show:
"This webpage has a redirect loop"
This is what I have so far:
<system.web>
...
<authentication mode="Forms" />
<authorization>
<deny users="?" />
</authorization>
...
</system.web>
I tried adding the <forms> tag in between <authentication /> with loginUrl as Login.aspx, but still same error. I've also added the <location> tags to allow access to the App_Themes and Images folders.
I'm currently using VS Express 2013 for Web with IIS Express integrated.
Any help would be appreciated!

If this helps anyone out there, I finally found the solution to be that, when implementing the <forms> tag, the loginUrl attribute should have a value of just the NAME of the login form, WITHOUT the .aspx extension. So it looks like this:
<system.web>
<authentication mode="Forms">
<forms loginUrl="~/Login" />
</authentication>
<authorization>
<deny users="?" />
</authorization>
</system.web>
Thanks to whoever that tried to help!

Enable Anonymous Authentication in the IIS and then try.
Run->ingetmgr->IIS Group->Authentication->RightClick on Anonymous Authenticaion and Enable.

Windows authentication keeps asking username password even credentials are correct

I have developed an application to allow windows authentication and hosted it to the live server. in my local pc i am able to get the username password. but when i am accessing from web (e.g. websso.mydomain.com) it keeps asking credentials even after i entered correct credentials.
<authentication mode="Windows">
</authentication>
<authorization>
<deny users="?" />
</authorization>
<identity impersonate="true"/>
i have added above tags in web.config, hosting server is windows server 2008 R2. I have tried to get username from
WindowsIdentity.GetCurrent().Name
Environment.Username
Request.ServerVariables["LOGON_USER"]
Request.ServerVariables["AUTH_USER"]
HttpContext.Current.Request.LogonUserIdentity.Name
Is there any changes which needs to do in IIS or any steps to follow to configure windows authentication.
Installed IIS version is 7.5

I had a similar issue recently, try ensuring that the windows user has read access to the directory on the server.

Checkk application pool owner in IIS
It should be network services

websso.mydomain.com looks like internet domain name, not intranet domain name because it has sections. According to https://support.microsoft.com/en-us/help/258063/internet-explorer-may-prompt-you-for-a-password you should use domain name without sections (e.g. http://websso/) or add your domain name to security settings of client browsers

Try updating your <authorization> to include an <allow> element as I have done here.
E.g.
<system.web>
<authentication mode="Windows" />
<authorization>
<allow users="yourdomain\someotheruser" />
<deny users="?" />
</authorization>