一切都很好。
我的笔记本电脑安装了SQL Server
我格式化了我的笔记本
安装的SQL Server（最新版本）
然后更改了我的计算机名
旧名为：台式机-EP40R17
新名称为：戴尔G3
现在尝试添加新的用户访问数据库，因为我以前做格式化之前
我添加了名为demo的新用户

并像以前一样设置用户

但当我尝试将新的计算机名添加到Securables时
我得到这个错误

如何解决这个问题并让一个新用户工作？
我尝试删除用户并创建一个新用户，但仍然无法使用新用户ID访问服务器

编辑

我使用以下脚本从SQL Server中删除了旧服务器名称并添加了新服务器名称

SELECT @@SERVERNAME

sp_dropserver 'DESKTOP-EP40R17'

sp_addserver 'DELLG3', 'local'

问题仍然发生
我无法使用新用户ID登录
这是它现在的样子

以下是错误文本

===================================

Cannot connect to DELLG3.

===================================

Login failed for user 'demo'. (.Net SqlClient Data Provider)

------------------------------
For help, click: https://learn.microsoft.com/sql/relational-databases/errors-events/mssqlserver-18456-database-engine-error

------------------------------
Server Name: DELLG3
Error Number: 18456
Severity: 14
State: 1
Line Number: 65536

------------------------------
Program Location:

   at System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, SqlCredential credential, Object providerInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString userConnectionOptions, SessionData reconnectSessionData, DbConnectionPool pool, String accessToken, Boolean applyTransientFaultHandling, SqlAuthenticationProviderManager sqlAuthProviderManager)
   at System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions)
   at System.Data.ProviderBase.DbConnectionFactory.CreateNonPooledConnection(DbConnection owningConnection, DbConnectionPoolGroup poolGroup, DbConnectionOptions userOptions)
   at System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection)
   at System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
   at System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
   at System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource`1 retry)
   at System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry)
   at System.Data.SqlClient.SqlConnection.Open()
   at Microsoft.SqlServer.Management.SqlStudio.Explorer.ObjectExplorerService.ValidateConnection(UIConnectionInfo ci, IServerType server)
   at Microsoft.SqlServer.Management.UI.ConnectionDlg.Connector.ConnectionThreadUser()