I started the instance in single user mode and ran this:SELECT name, physical_name AS CurrentLocationFROM sys.master_filesWHERE database_id < 5 here are the results. master F:\MSSQL\\Default\DataFiles\master.mdfmastlog G:\MSSQL\\Default\Logfiles\mastlog.ldftempdev H:\MSSQL\\Default\TEMPDB\tempdb.mdftemplog H:\MSSQL\Default\TEMPDB\templog.ldfmodeldev E:\Microsoft SQL Server\MSSQL.1\MSSQL\Datamodellog E:\Microsoft SQL Server\MSSQL.1\MSSQL\DataMSDBData E:\Microsoft SQL Server\MSSQL.1\MSSQL\DataMSDBLog E:\Microsoft SQL Server\MSSQL.1\MSSQL\Datayou're right.. when i tried to move them back i did not specify filenames for the model and msdb.I started up in single user mode and reissued my commands:USE master;GOALTER DATABASE MSDBMODIFY FILE (NAME = msdbdata, FILENAME = 'E:\Microsoft SQL Server\MSSQL.1\MSSQL\Data\msdbdata.mdf');GOALTER DATABASE MSDBMODIFY FILE (NAME = msdblog, FILENAME = 'E:\Microsoft SQL Server\MSSQL.1\MSSQL\Data\msdblog.ldf');GOUSE master;GOALTER DATABASE MODELMODIFY FILE (NAME = modeldev, FILENAME = 'E:\Microsoft SQL Server\MSSQL.1\MSSQL\Data\Model.mdf');GOALTER DATABASE MODELMODIFY FILE (NAME = modellog, FILENAME = 'E:\Microsoft SQL Server\MSSQL.1\MSSQL\Data\modellog.ldf');GO
The instance started with no problem!!