Read Following KB for support network database files.

http://support.microsoft.com/default.aspx?scid=kb;en-us;304261

You may try to delete it from sysusers table directly.

The public role is a special database role to which every database user belongs to the role by default.

Can you use select statement to list all your users in Access or able to export the users into a table or text file?

Once you have have users name list,...

Are these database warm standby from log shipping or replication?

Quoted from sp3readme.

"If SP3 Setup detects user databases or filegroups that are not writable, it:

Applies the SP3 replication updates to all writable user databases.

Writes a list of the non-writable...

Use following commands to verify the database collation and sort order.

select DatabasePropertyEx('msdb','Collation')

go

select DatabasePropertyEx('msdb','SQLSortOrder')

go

And use trace flag T3608 for your MSDB restoration or re-attachment.

http://support.microsoft.com/default.aspx?scid=kb;EN-US;224071

In SQL Server, System admin (sa) or logins with 'sa' privilege are the database adminsitrator who are able to do anything.

You can create and maintain two database roles with proper...

Sort order 51 is Dictionary order, case-sensitive, for use with 1252 character set.

sp_helpsort

http://www.microsoft.com/technet/treeview/default.asp?url=/technet/security/virus/alerts/slammer.asp

sp_who2 should be enough to tell you who are connecting this database. you have to kill all connection to this database before rename it.

use master

go

sp_renamedb 'CE85Test', 'CE85TST'

go

MSDE doesn't have EM but if you have other SQL Server installations, you should be able to use the EM for your MSDE.

Or change the following registry key with...

Use Enterprise Manager to make the change.

Have you run "DBCC UPDATEUSAGE"?

I would check whether user who is configured in Oracle Linked server 'Warehouse' in SQL Server has select permission to 'Products' table in Oracle side.

Do you query other tables with nothing too?

Try select * from openquery(Warehouse, 'select * from SYS.ALL_USERS'). It should give all your username in Oracle database.

How to you configure Oracle Linked...