Error 18456 in MS SQL Server

Within the Microsoft SQL Server Management Studio in the object explorer:

1. Right click on the server and click Properties.
2. Go to the Security page.
3. Under Server authentication choose the SQL Server and Windows Authentication mode radio button.
4. Click OK.
5. Restart SQL Services.

HTTP Error 401 Unauthorized

401 - Unauthorized: Access is denied due to invalid credentials

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.

To solve this you have to edit the permission on your website.

1. Click edit permission button located on the right pane in the IIS manager.

2. Select the security tab.

HTTP Error 404

Not Found

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HTTP Error 404. The requested resource is not found.