Today I decided to install SCCM to see if it would help with the WDS work I have been doing.
After a quick download from the Microsoft website, I kicked off the installer, only to find a nice helpful error message:

Setup is unable to connect to SQL server with the connection information provided. Verify the following:
- The SQL Server and instance names are entered correctly
- The specified SQL Server instance is not configured to use dynamic ports
- If a firewall is enabled on the SQL Server, inbound rules exist to allow connections to the correct ports
- The account used to run Setup has permissions to connect to the specified SQL Server instance.

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