You may be aware default 4 SQL Server system databases master, model, msdb & tempdb are created automatically when the SQL Server is installed. Those databases files can be located under default directory assuming C:\Program Files\Microsoft SQL Server\MSSQL.1\MSSQL\Data and when you look into this directory additional data file - Mssqlsystemresource.mdf. You will be surprised to see this particular data file's database cannot be found in Enterprise Manager or SQL Server Management Studio. This...(
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Read the complete post at http://sqlserver-qa.net/blogs/tools/archive/2007/12/11/sql-server-error-4616-you-cannot-perform-this-operation-for-the-restore-database.aspx