Can't attach northwind database to sql server 2008 R2 - sql-server

Question

When I try to I get the following error in SQL Server Management Studio:
TITLE: Microsoft SQL Server Management Studio
Attach database failed for Server 'AHAKEEM'.
(Microsoft.SqlServer.Smo)
ADDITIONAL INFORMATION:
An exception occurred while executing a Transact-SQL statement or
batch. (Microsoft.SqlServer.ConnectionInfo)
Unable to open the physical file "C:\SQL Server 2000 Sample
Databases\northwnd.mdf". Operating system error 5: "5(failed to
retrieve text for this error. Reason: 15105)". (Microsoft SQL Server,
Error: 5120)
This is a fresh version of Northwinds mdf which just came from Microsoft's installer.

Answer 1

Error 5120 is a sharing violation on the file you're opening. Try starting SQL Management Studio as Administrator and make sure that the db isn't attached already.

Answer 2

The error occurs when the mdf or ldf file is missing, if its an ldf we can recreate the same using the below listed scripts:
Method 1: To recreate all the log files
EXECUTE sp_attach_single_file_db #dbname = 'SAMPLEDB',
#physname = N'D:\MSSQL\DATA\SAMPLEDB.mdf'
GO
Method 2: If one or more log files are missing, they are recreated again.
CREATE DATABASE SAMPLEDB ON
(FILENAME = N'D:\MSSQL\DATA\SAMPLEDB.mdf')
FOR ATTACH_REBUILD_LOG
GO
Method 3: If only one file is missing, they are recreated again.
CREATE DATABASE SAMPLEDB ON
( FILENAME = N'D:\MSSQL\DATA\SAMPLEDB.mdf')
FOR ATTACH
GO

Answer 3

I tried to install Northwind and pubs Sample Databases for SQL Server 2000 and attach both databases in SQL Server 2014, and gave me an error because they were compatible version.
These are the steps to successful install the Sample Database in your SQL Server 2014:
After you download the Sample Databases in your PC, then open SQL Server 2014 Management Studio. After successful connection, your SQL Server instance should be listed in the Object Explorer.
Now under File Menu select Open > File.
Find the instnwnd.sql in your computer and select it. Click Open
SQL script should open in the main window.
Do not click on Execute yet. If you do, you will get the following error:
Could not find stored procedure ‘sp_dboption’.
Around the line 20, remove the following two lines:
exec sp_dboption 'Northwind','trunc. log on chkpt.','true' exec
sp_dboption 'Northwind','select into/bulkcopy','true'
Replace them with this line as shown below:
alter database Northwind set recovery simple
To attach 'pubs' database, repeat the step 2 above and this time open instpubs.sql file. Replace the sp_dboption as you did before with:
alter database Pubs set recovery simple
All that is left is to execute the script, so click on Execute in both scripts.
Note: the folder location for your sample database by default is "C:\SQL Server 2000 Sample Databases"