Steps to Install SQL Server 2008 Service Pack 1 (SP1)
service pack - How can I verify whether or not Windows Server 2008 R2 has SP1 installed? - Server Fault
Installing SSDT on Windows Server 2008 R2 SP1 - Server Fault
Knowledge Base Solution - How do I determine which version or edition of Microsoft® SQL Server is installed for CCH® ProSystem fx® Engagement or Workpaper Manager?