Hi Gary,
I understand that you would like to know if you can remove the NT
AUTHORITY\NETWORK SERVICE user from your SQL Server database and then use
the user account ASPNET as the dbo user of your database.
If I have misunderstood, please let me know.

Yes, sure! You can replace the NT AUTHORITY\NETWORK SERVICE account with
your ASPNET account by the following steps:
1. Log on your SQL Server instance with a system administrator;

2. Create the new login ASPNET in SQL Server Management Studio (SSMS). If
you are using SQL Server 2000, please use Enterprise Manager (SSEM) to
explicitly create the new login under the Security folder. Of course, you
can also run the following T-SQL statement to add the login:
sp_grantlogin N'ASPNET'
Go
exec sp_defaultdb N'ASPNET', N'<your database name>'
Go

3. In SQL Query Analyzer or SSMS, run the sp_changedbowner to change your
database owner from NT AUTHORITY\NETWORK SERVICE to ASPNET.
EXEC sp_changedbowner N'ASPNET'
Go

4. If there is no other database using the network service account and if
you delete the login NT AUTHORITY\NETWORK SERVICE from your SQL Server
instance, you can do this in SSMS or SSEM by manually deleting the login
under the Security folder or running the following T-SQL statement:
EXEC sp_revokelogin N'NT AUTHORITY\NETWORK SERVICE'
Go

Hope this s. Please feel free to let me know if you have any other
questions or concerns.

Best regards,
Charles Wang
Microsoft Online Community Support
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