Hi @Michel Mouckomey ,
I've tried entering my computer name but that didn't work.
Have you or your teacher installed SQL Server default instance on your computer?
If you have not, then you need to install SQL Server first, as SSMS is GUI Administration Tool for SQL Server. Please refer to SQL Server installation guide and Step By Step Installation Guide which might help.
If you have installed the SQL Server instance, could you please share us the detailed error massage? Please make sure the SQL Server instance is running in the SQL Server configuration Manager.
Best Regards,
Amelia
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