Hi @James Slater ,
Welcome to Microsoft Q&A!
May I ask have you installed SQL Server 2008 R2 SP2 before? If yes, I suggest that please install the latest service pack for your SQL Server 2008 R2. SQL Server 2008 R2 Service Pack 3 contains Cumulative Update 1 to 13 from SQL Server 2008 R2 SP2, see below:
And you could find Microsoft SQL Server Versions List which still supported from this link
Best regards,
Carrin
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