In the engine room of the installation configuration, the first step requires additional database, 5120 may appear in the additional database, operating system error denied access.
1. error:
Solution one: modify permissions mdf and ldf files
Find the mdf and ldf file is located right → Properties → Security
Do not forget to have permission to modify ldf file, or otherwise it will error
Solution two: Switch authentication methods, the use of windows Log
Solution three: Change Service
First, open the "SQL Server Configuration Server → select" sql server service "→ Right-click the" SQL Server (MSSQLSERVER) "→ Properties
→ Select an account → local system built-in login
Most of the issues should be a method can be solved, but it does not hurt to know more about.
