Sql Server Login Disable Windows Authentication

How can I disable the windows authentication mode of SQL Server

It's not possible to disable windows authentication mode. SQL Server suports only two modes:

1. Windows authentication only
2. Mixed mode (windows authentication and SQL Server authentication)

You can limit access via windows authentication by restricting (or removing) the permissions of the windows users/groups with logins in SQL Server.

how to protect database from windows authentication

From MSDN discussion:

You cannot disable Windows Authentication on SQL Server. In fact, SQL
Server recognizes two modes of security:
1) Windows Authentication
2) SQL Server AND Windows Authentication

There's a way out, however. Users of the Adminstrators group of
Windows are able to connect to the SQL Server because there's a login
account in SQL Server for it and is assigned the System Administrators
role. You'll need to delete that login. But before you do so, please
be sure that
1) the security mode is set to SQL Server and Windows, and
2) you know the password of SQL Server's sa login Otherwise, you'll render your SQL Server inaccessible!

To do so, follow these steps:
1) Open SQL Server Enterprise Manager
2) Expand the nodes to reveal your SQL Server instance
3) Expand your SQL Server instance node to reveal the various nodes
4) Expand the Security node and click Logins
5) Right-click the BUILTIN\Administraors login and click Delete, click Yes
when prompted for confirmation

Disable Windows Authentication while connecting into database

SOLUTION :

Just remove from your connection string:

Trusted_Connection=True; Integrated Security=True;

Thanks to : Schadensbegrenzer
Explanation : When using Trusted_Connection=true and SQL Server authentication, will this effect performance?

Disable Sql Server Windows Login Account?

Try changing the connection string to: Provider=SQLNCLI10;Server=myServerAddress;Uid=myUsername;Pwd=myPassword

Update: While this may have given you the answer you were originally seeking, I agree with everything in Dave Markle's post and should have mentioned that earlier.

Sql server all logins are disabled

I solved this problem by uninstalling some features of sql server then reinstall them and restore databases.

These are the steps:
1-Run the uninstaller and remove only Data Base Services and the two items listed under it.
2-Run the setup and choose add features to existing instance and then when you reach the features page choose only those removed in the previous step.
3-Now you have fresh sql server accounts and database engine, but your databases are still there,
by the following query you can restore them one by one:
USE [master] GO CREATE DATABASE [database_name] ON (FILENAME = '...path\dtabase.mdf' FOR ATTACH; GO.

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