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error message
No connection to SQLEXPRESS can be established
Network-related or instance-specific error when connecting to SQL Server.
Server not found or can not be accessed.
Verify that the instance name is correct and that SQL Server allows remote connections.
Error 26: Failed to determine the specified server / instance
Subject: SQL Server
The problem has been solved with the update from SQL Server 2008 to SQL Server 2014

You have to start the service
Taskmanager-> Services-> SQLAgent $ SQLExpress
Using context menu -> Start

Or better: open services in the task manager (or via Cortana)
And there under Dialog: Services the entry: SQL Server (SQL Express) switch from manual to automatic

Under the dialog: Properties of the service SQL Server (SQLExpress) the start type of
  • Manually
  • Automatically (Delayed Start)

SQL Server 2014: Can not connect to SQLEXPRESS
SQL Server: Compress a SQL Database with Shrink Database
SQL Server: Anmelden mit .\Sqlexpress
Fehlermeldung: beim Anfügen einer Datenbank
SQL Server : Tabellen Änderungen speichern ohne Nicht-Zulässig-Meldung von Entwurfsänderungen
Anleitung: Kopieren einer Datenbank als neue Datenbank


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