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- SQL Server Edition Operating System Compatibility (Warning)
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* SQL Server Edition Operating System Compatibility
* Some components of this edition of SQL Server are not supported on this operating system.
For details, see 'Hardware and Software Requirements for Installing SQL Server 2005'
in Microsoft SQL Server Books Online.
using Enterprise edition you can only install the client tools on XP. You need the developer edition or an express edition to install on windows XP.
EDIT: This is per http://www.microsoft.com/sql/editions/enterprise/sysreqs.mspx
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