>Hello
>an error ocurred when use 'Attach Databases' option that i downloaded form a site which sold a book to me, those are northwind and pubs from sql 2000, the error message were the following
>Attach database failed for server 'nombreequipo1'
>Additional information
>An exception ocurred while executing a Transact SQL statement or batch
>DAtabse 'Northwind' can not be upgraded because it is read only or has read only files.Make the database or files writeable, and rerun recovery.
>
>My question is how can i make this database writeable or whta other thing i can do?
>
>Thank you in advance
>
>Luis Martin

Luis,

I think the files you copied have Read-Only attribute (check it in the Windows Explorer by the right click and change there).